I'm glad the devs seem aware of the task before them. UE3 is cpu heavy, which doesn't favor the switch too much which is far more holistic in it's design. As long as fidelity is kept to medium and they optimize reaching their desire isn't hard considering apus with less overall than switch can easily climb in to the 100s if fidelity isn't a desire.
Moving to UE4 isn't necessarily a good thing. We have the vanishing of ethan carter as proof of that. Optimization matters more especially considering the engine and the platform involved. Really hope someone from nvidia convinces nintendo to get more hands on with performance and titles on the platform. One company is making a killing from their presence in this area the other is using their architecture in switch. It's pathetic when AMD is more hands on than nintendo.
Mariokart does more and is still physics heavy as noted in interview switch allows them to do more and have more boxes vs WiiU. I have faith especially considering they want to get this right especially at 720p, this game could easily do that or a decent dynamic resolution. 1080p with eyecandy is a no go but considering how many play on ultra with pcs vs the bulk of console and potato users it's not an issue.
This potato vid makes it clear why 1080p 60fps isn't happening considering it has noticeably strong intel dual core cpu doing the task with a shit igpu.. You could gut it to death with no optimization you still come up a few frames short. Switch does offer Psyonix potential but are they going to do what shinen likes to do is going to be the question. Considering that the potato machine is tweaks they blocked this will be a good test case like other multiplatforms of what switch can do when something is actually tried.
RAWRferal there's no need to gut using performance settings and dropping res will offer clear improvements. I seriously don't see Psyonix doing a half hearted effort on the platform. So we should get something nice for that level, far better than what the potato is offering.