It may not be the most cutting edge game on PS4/Xbone, but the Switch version is still clearly based on the current gen rather than last gen versions, plus given its performance issues even on PS4, the fact Switch runs at a stable clip is commendable I think.
What's he saying is that game itself doesn't look much like 8th gen game to start with, no matter the platform (runs on potato PCs, just like Rocket League previously). And that performance issues are with 60fps on PS4 and XBO.
I have it on PC, I always liked SE games, I thought SE3 was ok. I find that SE4 is much better game, both gameplay wise and visually, but it's nice seeing more potential audience being exposed to franchise.