The altitudes would probably be good to lower first.
That being said, the map still isn't going to work that great until the there are either
A. More bases on the outside of map to make the outside area bases seem closer to each other.
B. OR, outside bases should be pushed closer together.
C. Redo entire layout of bases from the start to make it more symmetrical.
Besides the strat issues. These changes would allow more fights to occur and play out much better. It would increase action around the map instead of all the focus in the middle.
I would say the strats first.. the puffy ack in the middle is more annoying than the hills.
If more bases were added around the edge and between the edge and middle, you wouldnt have to dink with altitudes at all IMO. Higher alt fights toward the middle with lower altitudes towards the outside. Everyone wins.
Actually, lazer has a good point also. I like this idea.