Yep. Just look at the change in design between
Serra Ascendant and
Ayli, Eternal Pilgrim. Thank God they figured out stuff like the former was a big problem for EDH and stopped doing it. I'd bet money they never make another card that has an ability that turns on when you have 30 or more life ever again.
On the topic of cost reduction abilities, I'm impressed they seemed to get Improvise just right. I don't think any of those have broken a format like other ones have. Probably because it's literally just a worse Affinity, but still. Good on them for playing it safe with that one.