What I think might be amusing instead of changing the spawns is to take that tower nearest spawn 2 and make it one of the gatehouse type towers with an internal staircase and an entrance at the bottom.
This gives spawn 2 archers a good spot to setup. As it is, the tower is a nice archer spot anyway but you have to ladder up to it and it's a bit tricky since it's so tall.
A second map ladder around the northeast corner might be nice too. The one map ladder there is handy but a bit predictable. I would put the other one a bit to the southeast so that spawn 2 can come in over the wall just east of that little building.
