The ID/Avalanche collaborated Rage 2 will be a strictly single player affair unlike Rage 1 which had co-operative gameplay. This is no suprise as Avalanche is a company that only concentrates on single player titles and that the only relation to Rage 1 is the name, this is essentially a reboot of the IP.
they apparently went back and optimised the engine alot, no surprise as just cause 3 runs like crap even on an Xbox one X, that was an unoptimised mess at the launch of this generation.
The engine does look like it received a ton of upgrades if you look at the just cause 4 and Generation Zero footage
It won’t as that was unique to IdTech’s “mega texture” system. It was debuted with Quake Wars I believe and that also suffered from tbe same problem.