Looks sound mechanically.
Though in terms of notes, bear in mind the ability to take Mental consequences to cast additional spells, and that falling damage is nasty, but kinda should be. A base 5 stress hit reduced by Athletics is a 3 or 4 stress hit on average. That sounds about right for a 10 foot fall, or a parachute landing.
Now, personally, I wouldn't use the falling rules to simulate jumping down. That should be a Barrier value and maybe some damage if you don't beat it, the falling rules are intended to reflect someone falling unprepared, not actively jumping.