I just got to Gen2 on my latest run and again I notice that it's still a LOT better than Gen1 in terms of balance.
I know I've voiced this opinion before, but I still really think Gen1 needs a difficulty increase. I can understand trying to allow new players room to get used to the game, but most players and reviewers are only ever going to play Gen1 Normal which makes the enemies too weak for a lot of the gameplay to really work.
As it is, I think this is going to attract a some of criticism about enemies being pushovers and most of the weapons/gadgets being completely unnecessary.
That said, if you're really set on keeping the current difficulty curve, then consider maybe adding a "skip Gen1" option as a new game option.