You started this two months months ago and you don't even notify WP:MED which uses the pmid link extensively? We just found out because someone posted at WT:MED.
Don't do this. We use it all the time.
What does this actually hurt?
Did you all actually do something on the back end already? Is that why the autofill no longer works in the citation template that is part of the toolbox in the editing window?
ARGH. I deleted a lot of swearing before I posted this.