I am starting a new thread here on the specific topic of the "reply" button, because the other thread on new features has become too unwieldy and covers many different topics.
So there is a "reply" button under every post. But when you press reply, it does not reply to any specific post. Your "reply" just goes to the bottom of the queue. So on reading one is never sure what a post is a "reply" to, unless the poster is specific. This leads to some poster replying to several posts using pretty much the same reply, as is seen in this example (saying thank you several times):
So unless TA can maintain a tree structure with posts (as an example, you can see this on chowhound.com), you may as well just have one "reply" as example, in Yelp talk threads.