@Morley - more units would result in lag, so we're unlikely to raise the population cap any time soon.
@Laradon - I'll look into the pvp issues you are having.
I thought the 12hr attack protection timer was great too and it's still there, but the new way it works will give new players more protection and that's what a number of players have been asking for.
New players still start with 12hrs protection. The Attack Protection can be cancelled if you want to PvP, but it will reset to 1hr if you don't have any protection when you log in without walls. And as you noted, it won't start counting down until after you've built walls.