So I've just got a few suggestions that I think might help the game, and some ideas that I think would be awesome if implemented.
Mechanics
These are just things that I've noticed about the interface. To be honest, I've written code but never an RTS engine, so if any of these are really tough to implement and it just kind of sucks because you'd have to rewrite classes A, B, and C and refactor functions F, G, and H, I get it.
1) Minimap panning. One feature I thought was cool going into SE was that when you pan the map, the camera doesn't just jump to the location. Rather, it sort of eases into it. Which looks awesome when you're trying the game out, but when you're trying to play efficiently... I don't know. I find it difficult to be able to jump between managing my base and my army when I have to wait for the camera to scoot over there, and a lot harder to quickly pull back wounded units while the camera is still moving. I'd suggest just making this feature a toggleable bell/whistle: so for example, if you have it disabled and click somewhere on the minimap, it'll just instantly jump there.
2) Onmousedown upgrades. I think many people on the TZ IRC have heard me rant about this one, and rolled their eyes and told me to stop complaining. Okay, I'll admit this one's a little trivial, but it, like eased map panning, sort of makes doing things in the game a little less efficient. Basically, the upgrades for each tech building (Barracks, Mage Guild, etc) show up on mouse up (after you release the left mouse button) instead of on mouse down (right when you press the left mouse button down). In addition, if you move the mouse too far before you release, it'll open up the wrong building, wasting a lot of precious time (especially if you're trying to macro while managing a battle).
Cool features
These are just things that I think would be really cool to see in the game. Probably not useful, just fun to see. :D
1) Map hotkeys. Basically just hotkeys that, when pressed, allow you to jump to any preset part of the map.
2) Hotkeyed upgrades. I know blast, poison spray, and e-wall are bound to Q, W, E. Along a similar line, what if, for example, you could research rage by clicking on the Barracks, then pressing Q?
Also +1 to Lobby if it could be decently moderated. Seems like a solid idea, and might help fix the issue with all the mysterious alts showing up all the time as they'll have to talk in the lobby. (Those 8-year-olds though... QQ'ing everywhere)