I finally cracked this open last night for Switch and started playing it in portable mode. So far, the frame rate is all over the place. Once you get into an area with an average amount of activity and stuff (cars, people, etc.), the frame rate dips even if you're just running.
I'm playing a physical/retail copy and the load times aren't super fast, but they seem to be better than what I remember on Wii U. I timed it and it was about 45 seconds from the TT Fusion logo to the title screen. Once I started a game, about the same amount of time for the first load. The beginning of a chapter/mission seemed to be about 15 seconds.
Also, patch? What patch? It hasn't prompted me to download anything.
Either way, I paid $16 for it after some rewards and GCU at Best Buy and I'm glad I did. It's a fantastic LEGO game even if it's not perfect. I would like to see them patch it and clean up the performance some, but it won't be the end of the world if they don't.