Just gonna throw some stuff out there.
I do like some of what the current Survival has:
Special/custom mobs. Doesn't have to be the same, but something not vanilla for mobs..
Regen resource mines. Helps save the 'natural' look of most of the world instead of being dug out by people who want the blocks.
Backpacks or similar extra storage plugin
AutoSort. I love that shift+click function to deposit similar items into containers and the /depositall command that deposits all similar items into nearby chests.
For grief protection, I like what the current Survival is using. It's simple, effective, and user-friendly.
Timber/Treefeller (easy tree chopping plugin w/ replant)
Custom generation (like the Recreation world)
And some stuff from ESB may also be neat to have on new Survival if possible:
Mob Spawners, stackable, silk touchable
Upgradeable special Hoppers
In-game earnable ranks with benefits.
Ability to earn /fly (and buy w/ donor rank I suppose)
GUI /shop with quantity options.
MobCatcher type plugin
If entities become a problem, ClearLag or similar.
Quests of some sort.
Token Shop and uses for Tokens since those are network-wide. Maybe require items bought from TS for certain rankups. Allow tokens to be used in other shops or for casino stuff.
Mobs and players drop heads
Custom villager trading