while i don't strictly endorse this method of resolving the impotent skills issue i feel that it is one of the most plasuable solutions that wizards might implement and that is every skill has a shortlist of spells that a good enough ability check in the associated skill would let you replicate their effects, 'cast' them nonmagically with your skill check(DC scales with spell level), jump or haste through athletics, cure wounds, lesser restoration or revivify with medicine, find familiar, animal messenger, summon beast using animal handling and so on.