Interceptors can only re-target air-combat, not ground missions.
I imagine Meridian's reason is that it'd mean making battle loadouts at least semi-persistent, so your tanks and armours aren't instantly repaired, equipment restocked from the Sky Shop, temporary stat loss recovered, possibly within minutes. This would mean changing these things, and more:
- HWPs "don't exist individually"
- armors "don't exist individually"
- weapons/items "don't exist individually"
Quite possibly other changes as well.
So a non-cheaty implementation is outside the scope of the OXCE project, and in any case it's probably also too much work for any benefits.