Well, if there was a PvE world, then there would be a good reason to enable TNT again. That way, everyone's happy. PvPer's can raid and grief properly, and the PvEer's can go build and not worry about any of that.
Well, if there was portals, they'd be used a lot, running the resources out pretty quickly. So, your own portals would still be very useful. But I don't really mind about the portal part, it would just be a nice thing to have. I know it would make things easier, but it's something that you don't need to use if you don't want to.