Todd already confirmed vehicles aren’t in. It’d probably be a massive undertaking for DLC, so I suppose they’re leaving them out.
I don’t mind the boundaries, with so many planets I wouldn’t expect them all to be completely populated with actual content, and I have no desire to roam a bare or uniformly generated planet just to be able to say I can walk over the whole thing.
So’s Mass Effect and you most certainly can’t roam entire planets there. Gotta keep that scope realistic for the type of game they’re making. Stretch it super thin so it can pretend to be a space sim, or keep it realistic for a Bethesda title as they always do and have boundaries.