Love the idea of mixing RTS + timer as a resource. To be practical, though - probably should be a bit "cheaper" to wait (as it's still too slow for RTS, but for TBS - rushed too much).
Or maybe have countdown for execution, not for thinking?
Would be also great to have stats - at least in the menu. After winning the round, I don't think I even got the difference between goblin and soldier. Partially because I was too rushed due to time constraint :)
Great idea overall, definitely something to work with!