Hello Facer team.
Let me say first off that I like what you have going here.
I have been in the theming game for a while and was waiting for a nice clean Web based GUI development tool.
I was/still am the Admin over at the official Zooper Community page. I was hired by Themer as their in house Zooper nerd after they acquired the app, and before they killed it. I then helped Frank get Kustom Live Wallpaper up and going as the first closed beta member, and got his community started. All of this is not to boast, but just show that Im not some yahoo fresh from the boat telling you what I think you need to fix.
With that said, There are a few things I wanted to make note of after playing around with the tool for a few days.
First you guys should think of a dedicated feature request section, with voting and status notifications(planned/working/beta/release).
It REALLY helps keep the community happy in my experience and makes them feel like they are participating in the apps growth. It also help your team out as there is less need to answer the same request posts over and over.
GUI improvements. The formula window, OMG you guys are killing me. That single line space is just not enough for complex statements or formulas. Maybe a break out window or the like. Not sure how robust the Caret API is, but if that could be implemented as a breakout window, with your own syntax enabled, I cant really think of anything more someone could ask for. If you have never used it, its basically Sublime in a browser. Caret - Professional Text Editing for Chrome and Chrome OS
Missing Variables. Actually the list is pretty impressive as it stands.
There was one I found that seemed like obvious omissions.
1 - Boolean Day/Night var #isday#=1/0
Keeps us from needing to write more complex formulas just to determine if its day or night.
BBcode. This is one of those things that most people dont think is too important, but having the ability to manipulate text characteristics inside of a formula ends up getting used a LOT when its available.
Robust Shape settings. I assume that just like Zooper and Kustom, shapes are vectors in the editor and then before being displayed on the device are converted to bitmap. I know most people are going to import bitmaps from Photoshop, but as the display resolution on the devices begins to change we will start seeing faces that were once nice and crispy start to get blurry due to scaling. Adding the ability for some light weight design settings for the shapes, (glow, outline, clipping, gradients) would allow us to build more attractive themes that can scale to any resolution without compromise.
Thats it for now, but Im sure Ill come up with some other stuff.
Thanks again for the great app.