I think you're on the right track considering those factors and others (integrations with HA is another big one for me). IMO it's always a balance though - a perfect example for me personally is I still use Nest Protect devices because they just freaking work, and work well. Same with a smart display I have and some minimal smart speaker usage. So sure, there's a little bit of "lock in" there, but as long as your risk tolerance is ok with that (mine is) then you're golden.

The factors you mentioned, among others like HA integrations (preferably official), company reputation (I'm personally ok with some minimal lock in if the cost/benefit calculation works out), etc. are my first considerations when looking at new products. Wherever possible local first control is a great plus and can be an absolutely huge factor to be sure.