With an auto-calculated figure, users will have no insight into what the calculated figures are, and won’t easily be able to adjust them when they e.g. merge decks from two profiles together.
See, this is the problem. You’re favoring power users instead of new users. Anki is complex, and FSRS adds a lot of extra complexity as well, which makes Anki overwhelming for new users. You should be working on simplifying it. Speaking of which: Should Evaluate Button be Removed?