I feel there's too much discrepency between good saves and bad saves in 5E. With things like the paladin granting a +5 to saves, they clearly don't follow their own concept of bounded accuracy/defenses. Saves are either a joke, or nearly impossible.
PF2E's numbers work more to my liking for basically everything. You have degrees of training, Trained through Legendary, which give a proficiency bonus of +2 to +8. You add your stat and level as well. Most classes bad save is only one degree of training off from their good saves, so a difference of +2. Plus, PF 2 gives more stat bumps, and with raising stats above 18 requiring more points, characters tend to be more well rounded stat wise. Each effect requiring a save has critical success (beating DC by 10), success, failure, and critical failure (failing by 10+), resulting in a wider variety of effects possible other than 5E's overly simplistic binary pass/fail.