Some questions from a retired planetsider

[Jabberwocky]

I have been away from planetside for quite a while and I am kind of out of touch... So, I have a few nagging questions about the new features in PS.
1) Exactly how big is a lodestar compared to galaxy? Does it really just look like a flying rectangular brick?
2) Whats with this surge agile "exploit" i keep hearing about?
3) What kind of cargo can the lodestar carry? Its a vehicle transport right?

Thanks for clearing up some of my confusion