I would like for all of the brush controls to be present on Android, not just shapes. I would add lines and rectangles before shapes. But most likely would just do all of them (plus flood fill and ovals) at once.

The problem with adding new features to the Android port is that it's all temporary, and going to be lost once the Android port is rewritten on top of vanilla TPT. Right now it is a totally different beast, the only thing similar between Android and PC TPT is the simulation code, but everything else is different. I have a goal to rewrite Android entirely, basing it on vanilla TPT. During this endeavor we could add features current mobile misses. I can't make any promises on dates or features, I've had this plan for well over a year now.

There are also Lua commands for nearly everything, so you can do "tpt.brushID = 2" in the console to get triangle brush too.