I think the only trouble you'd start to have is using medium weapons on light bots. Like in stEVE, big guns don't really hit small targets that well. An assault bot doesn't strike me as overkill in the least.
In fact, if you want to buy a heavy mech and go thumping about, demolishing newbie drones, who's to rightfully argue that you shouldn't? This is as sandboxy as that other game you played so enjoy yourself!
By the way, welcome to Perp! We're glad to have you. I hope that you enjoy the game and stick around to do stuff here.
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