I played with the new forum for a bit and first I want to congratulate you guys for the great work! It looks really good and has some pretty cool features!
There are a couple of suggestions that I would make however if I may, please note I’ve only spent an hour on it and I may have gotten things wrong. Also, please don’t take these as a negative feedback as I’m focusing more on the things to improve than on the things that I like. Again, I really like the way this is going, and hopefully these suggestions can help.
- My first question is about the ordering of the posts. I understand that you wanted to make fresh content always appear on top and as such you are filtering by the date of the creation of the post. While this sounds good in theory, I note that this goes against the standard of sorting by time of last comment. I think that if you keep with that sorting, there’s a risk that only fresh content will get views and that it won’t promote a longer style of threads. Older interesting threads that could go for dozens of posts around a month will be lost and virtually inaccessible.
A side effect of that would be long thread not happening, and only “superficial” talking going on with short Q&A type threads. While I’m sure it’s a good thing to have, sacrificing the ability to have longer discussions is a high price to pay.
As an example, I replied to an “old” thread here: http://www.chefsteps.com/forum/posts/6a0c14500c2411e493761796aac043da
Nobody knows about it with the current system. You are showing “5 comments” in the main view but we don’t know when was the last one. Is the thead still alive or dead? I don't know! I guess the top poster gets a notification but that doesn’t include other people (thread outsiders) who may want to jump in on the discussion.
- This goes in tandem with my first point but my second point is accessibility of posts. Because there’s a small volume right now, the idea of infinite scroll works. Just like the ordering, I’m not sure it’s going to scale as a way to access really old posts. (By all mean keep infinite scroll but don’t let it be the only way to go look for older things).
So how to improve accessibility?
First would be search which I’m sure you already plan on implementing.
Second would be to add more ways to see threads. You already kinda implemented this with the related posts column, but I think you could expand on it. One way to keep your ordering and still make older threads live would be to use the sidebar to show the latest active posts (a column sorted by last posts in threads) for example. You could also think instead of showing featured recipes, showing featured threads (maybe the most faved ones? I don’t know!).
I feel compelled to have a third point but I don’t really have one. Sorry.
- Some thoughts on category views. Top looks gorgeous. I personally find the category menu font slightly too condensed, it could be because of the opacity that it’s
slightly hard to read. This is really a minor point and I’ve only checked on Windows with non-retina/high-DPI display for now.
I love the ability to reply directly inline. The position of the reply box in between content and other posts doesn’t really push you to read other comments first, but I understand the choice of putting it there. If you open a large thread, having it below can be confusing (but then again, wouldn’t you want to at least read what others had to say first?).
Slight inconsistency regarding likes/follower. If I click Like on a post it gets a cool orange under roundrect, if I click “follower” it doesn’t. It’s not obvious that clicking “3 followers” would add you to the list. This may need icons? If I like a Subpost, you use a heart icon with another metaphor (Like/Unlike + heart icon at the right of that block). You could probably tweak that.
- Thread view. As mentioned in another thread, top left should bring back to home, not forum home. But there’s a need to go back to category (after a while I saw the “in Recipes” next to the time of post, not obvious). Why not add the category bar from category view in some way to that view? That could add some color too maybe (page feels very white, lacks orange!).
“Create new post” button is a bit weird to me on that page. I’m reading a post, would creating a new post be a reply to what I’m reading? That was my first thought.
Related posts. How does that work? I have no idea yet.
- I can self-like my content, this probably should be a no-no? Maybe it’s what cool kids do nowadays, I don’t know, it feels weird to me 
- What am I following? There probably should be a view to tell me that? Could be a sidebar with activity on my followed stuff + a list in some profile?
- Posting. I love the design but I reaaaaaally think that this edit box should be expandable if you want to promote deeper interactions. Either add a resizable handle or a button to make it bigger? I typed this in a text editor, I would never had typed it in that small and narrow a box for example. Please consider this!
Styling stuff. Are links auto hrefed? (I’ll see after posting this I guess). What about adding some way to add bold or italic maybe? I tried stuff like *bold* that you usually see on forums but didn’t seem to work.
You can still type while picture upload. I’m not sure if it’s good, I know I had to upload my macaron pic twice, I don’t know if it’s because I was typing or something else. It’s a bit weird to type and have it pop below. What if I put return carriage and stuff, would it pop where I was when I started uploading? Or at current cursor pos when uploading is done? I don’t know.
Ok I guess that’s it for early feedback. I feel like I have to say again that this is in no way a negative critique of the work done so far, which I think is really a step up in many ways from the older forum.