Man, of course everyone wants bots. I bet S2 thought about adding bots when this game was first conceived. Unfortunately, coding in the bots is not easy and will cost a lot of time ( = money). So for now, they are focusing on getting the primary game running (such as matchmaking, more heroes, bugs) so that the game will be ready for release. S2 wants the game to be releasable ASAP, and worry about extra features later (such as the map editor). Other minor changes are probably more likely to get in because they are easy to fix.

But I will say this. The more support people put into this, the more important (ie. higher up on the to do queue) this subject will become.