Two new vehicles were just revealed:
I don’t really see a problem with these. It’s not like the AT-AT made much sense to begin with. In a world with spaceships, why would you use what’s essentially a giant camel-robot. But, it looked cool and intimidating, and in a space opera that’s really all that matters. I think the “gorilla AT-AT” could work pretty well.
As for originality, why is no-one talking about that spider-walker that we saw about a month ago. That’s actually something new.