If you’re worried about bugs I think you should be able to get Mod Organizer 2 running on Steam Deck, and with all the various stability mods installed New Vegas runs fairly well. The Viva New Vegas mod guide is a great place to start, it should have most of what you need to get going.
Good video. Definitely have mixed feelings about the changes to early laning. I’m sadly out of town for a few days now but will have to see what the meta is like when I come back. Initial impressions post patch was that it felt a bit too punishing when it comes to early laning. Might well be the devs wanted a push in a certain direction and that the meta will have to adjust. Extra Regen + Restorative Shot seems very attractive in lane now instead of a greedier build.