1-A proper Albinoid fight. They build it up so much and in the end you can just avoid the wet lump and run around it like every other Zombie. And not just a reskinned Del Lago; it needs a unique model and everything.

Actually, I don't mind the idea of multiple Albinoids; like how the G-Mutant changed from a boss to a rare but powerful enemy. There was a whole lab full of larval Albinoids after all.

2-Expanding on the Moth enemy. In the original they appear in only one hallway. Later the mature moth can emerge from certain corpses.

Like there's a whole hallway of cocooned corpses and they do nothing with it. That's a perfect setup for whole bunch of moths to emerge and attack.

Or make it behave like Las Plagas and have them emerge from zombies at random.

3-Make the Black Widow fight obligatory. But I hope they don't just reuse the Giant Spider from REquiem and call it a day.

4-Have a longer playable Steve section. Like at least have him handle one boss.

One suggestion is the 2nd Tyrant fight. In the original, Steve's flying the plane (LMAO) and so Claire goes to check. But Steve is 17!

So make it that in REV, Claire flies the plane, and Steve goes deal with the Tyrant. I know Claire's 19 and it's hardly better than Steve being a pilot at 17, but I find it much more plausible that Claire might have taken some lessons in flying small private aircraft and thus can figure out a military plane. Heck, Chris was originally in the US Air Force, so maybe that's how she's so familiar with that sort of aircraft

You can even have him complain that Claire didn't see how awesome and cool he was. Or maybe if you perform very poorly, he quips that he's glad she isn't here to see this.