You're viewing this from the functionality point of view, not the usability. Sure you can do that, but someone (particularly older folk) who are used to using the "create" button could get confused. That said, you should just kill the "create" button to fix the problem; it's redundant.
As I've just noticed, you probably need to add a "quote" button to the post options, too. If I want to quote say, a book, I have to quote someone else's post and then change the name and delete all the text. Kinda annoying. But as for your mad CSS skills, it's non-trivial that the "forum" and "chat" tabs also disappear when you tile the page. It'd be great if you could fix that.
Finally, I have some requests from a bunch of us on chat right now. Obviously the front page needs improvement, but you're obviously aware of that. More specifically, we need at least some sort of a blurb on aromanticism to gain us pagerank on search engines. A Google search for terms like "I don't want relationships" or "non romantic" or "i want sex but not relationships is something wrong with me" need to lead to this site, not AVEN and buzzfeed articles. Similarly, that horrendously-fonted name in the upper right needs to be changed to something more reflective of the site's purpose a la AVEN. Someone who is not very familiar with the community wouldn't get why the site is "Arocalypse". Something like "Arocalypse: the aromantic community" or something. All of our incoming members are from AVEN or ace/aro communities on Reddit, but we need to try to gain people unaware of what aromanticism is. That should be the main goal.
Also, I don't think that the search bar works in the slightest.