Very true. I always encourage TD’s to use a good baseline ruleset and then apply any well-considered customizations.
Unfortunately, death saves are also illegal in FSPA rules, a fact that predates my administrative involvement with FSPA (yoinks, a 23-year-old rule! it can drink!). But you make a good point, I’ll add a proposal to change this at our next officers meeting.
I can’t speak for Keefer, but personally, I can’t think of a reason to want to do this. Besides needlessly complicating the code (because of course there are plenty of occasions where an outlane switch firing does not result in end of ball: multiballs, ball save active, etc), I’d feel pretty bad if a player, especially a casual/newbie, got a Lazarus type save after an outlane drain, were overjoyed at their good fortune, and then found their flippers disabled. And who am I to deprive a skilled player of a good death save outside of a competitive setting where this technique is forbidden?
Also, Keith and I have some influence over newly-created games, but no influence over the thousands of games already in the field…