I posted in a previous prerelease my thoughts on the new command stations. I'll restate the fact that I agree that military ones are a bit underwhelming in most cases, and I think the way to fix this is a minor planet wide munitions boost
(say 1.2-1.4-1.6).
The big advantage to logistic stations over the space time manips are that they don't a)cost knowledge for the mk1's, and b) don't carry a increase in wave size. The way I play rarely has a backfield, so if I want a speed boost, they are about the only option, since I take waves pretty much everywhere. Also, having a speed boost on a border planet can make defending it a heck of alot easier when you can kite or chase down units better.