My opinions.
Reversion of the death message - I agree with you. This really would add a lot of suspense back into games and would make SG feel more "survivaly". (If that makes sense
)
Removal of tab - I don't really see a point, considering you can do /l to see a list of players anyways.
New lobby - Yes please! The current one is getting old.
Tier 3 chests - As long as it isn't OP, I'm down. I really like the idea of having it be randomized, so that not 1 single route is OP.
Limited mobs - Keyword, "limited". Me gusta!
Test map servers - Definitely. We, the community deserve the right to test maps before they officially become a part MCSG, to decide if the map looks nice and has quality gameplay. Perhaps the PMC servers could become the new test servers?