Yeah these things are crazy in freemode I can see why they left them out. I've stolen loads of them from the police and although I dont grief people for the sake of it I've given a few away to people that have and there's really no counter for them apart from a lucky rocket or getting sniped. They really should have left in the old ones in freemode but I think they wanted LAD to be more of a driving/riding experience.
Getting hold of one is actually quite easy in freemode I can do it solo in about 15 mins with about a 50/50 chance, with another player I can 100% guarantee getting one in about 5 mins.
Weird thing is once 1 is stolen can't seem to get another to spawn, need to try it on 6 stars though.
I think once more people figure out how to get them you'll see why they left them out and alot of empty games with someone flying around in one.