I agree with most of what you wrote, especially that other means would have been preferable and that Maduro wasn't legitimate (after the last election). I don't know what military tech deals might be involved but then there's a lot I don't know.
I see not wanting to tolerate a Chinese or Russian ally so near, especially one that allows military use of their territory. I'd like to block those two as much as possible. It's difficult to justify though considering countries are sovereign and they're supposed to be able to choose their own allies, and our many bases all around Russia, China, Iran, and NK. I guess that's where diplomacy, foreign aid and other means are useful.
I haven't given much thought to how all this could affect PRC and ROC. We're very early in the game with Caracas so a lot's TBC. I've read that PRC knows it won't be militarily ready to try to take Taiwan for a few years and that their bluster now is to try to bluff them into giving up without a fight. How do you think Venezuela affects China?