The reaction to this is totally not what I expected. Maybe a little, because people love that AAA, but I still expected a lot of complaining. However, if I didn't own most of these already I'd probably be pretty happy to get them.
I don't know how bad it is now, but I played some of JC3 around launch, and while it didn't run well, I certainly didn't find it unplayable. However, I probably made it less than halfway through the game due to finding it underwhelming compared to JC2, so I may not have seen the worst of it.
Downwell is great, and I played Super Motherload years ago and was surprised by how much I enjoyed it.