Kinda wish I'd seen this thread before.
I worked for the Mariners for 7 years. But I grew up in St. Louis...so...you know...
The collision rule was coming anyway, so might as well get it done. There's way too much money wrapped up in players these days to have someone get their knee/shoulder/head destroyed in a mid-May game.
I'm mildly concerned about letting umpires decide what "blocking the plate" and "contact" is, though. Is it a 0% thing? You CANNOT be obscuring the plate at all, and CANNOT make contact with the catcher? Seems like a lot of grey area.