I did check out Pokémobs and Pixelmon a few days ago. I'll probably test them out for stability purposes first.
Disabling block duplication may be necessary. Personal chests sounds like a very big plus. It'd save the hassle of having to hide them.
I'll also be appointing ops. I'm not sure who was an op on Jared's server, but if anyone knows, please post. (If anyone has already posted by the time you're reading this, please use the Like button or your own reply to confirm they are correct. I don't want to appoint a griefer.
And yes, blowing up others' chests to pillage their contents counts as griefing. Never mind, that's not possible.)
So, let's see here:
Simplified Chest Locking
Pokémobs
After looking through the mods Jared had installed, I think these would be nice too:
Remove Explosions
Message of the Day
Disconnect Reason
DeathCounter
Also, SK, are you referring to water/lava duplication?
Yay or nay?