It would be really useful if the Medium Biters were outrunnable at least. They'd destroy my base, but at least I'd have a hope of surviving. That makes sense to me, that a large creature would move slower than a smaller one, not the other way around. The game should be difficult, not impossible.
The thing that's getting really annoying as well is enemies targeting chests. All the contents are completely lost magically. Enemies should leaves focus on other buildings, and if chests are destroyed, the contents should be scattered.
