If you're not really in-tune to the goings on in baseball about this subject, here's an example [1]. So, I used to be pretty firmly in the camp that we should keep the robots away from homeplate, but there's been too many high-profile examples of inconsistent calls and frustrated players (and of course fans), which is causing me to rethink this. I have a little bit of a problem with arbitrarily determining the "size" of the strike zone with more permanence. The strike zone is obviously a semi-permanent thing that's highly dependent on who is behind the plate, and adjusting to that is one those things that's sort of an "art" of the game.
On the other hand, these kinds of dust ups and freakouts during a game are pretty funny and memorable and I suppose it would be at least a little sad for them to go away.
[1] https://www.youtube.com/watch?v=YPFERnpO-QQ