I wouldn't agree with that. I always like to think that what was good back then, should still be good now. This is the retro gaming mindset, where decent gameplay is timeless. And the simplistic gfx is a part of the retro charm too (baring the blasted blinking perhaps), for me at least. Of course, if somebody made a port with souped-up fx (like that Atic Atac on C64) that'd be cool too, but we got a faithful one and I'm happy with that.
About rollbacks (weren't they used to be called "save states" btw?), well, it seems an unfortunate function of the insta-access/gratification times we live in now. The race to be the first to post something on utubz is relentlessly ruthless. I'm sure it'd be the same if we had this internet malarkey back then, but we didn't and it's perhaps fortunate. Personally, I was never into even using POKEs, and I'm glad that it remained so to this day. I don't feel like I have to complete or see the ending of every game out there and I'm okay with just dying at some point and perhaps coming back to it - or not - later. That's just me though.
But if author explicitly asks for something like that not to be done, for a short while at least, then all that's left is just smh mode.