I have wondered since I started ESO why we don't get XP for non-combat activities. In a certain other highly successful subscription-based MMO, I can literally level from 1 to endgame by picking flowers and mining ore. Never have to kill a single living thing.
Harvesting/deconstructing/creating should all be able to earn XP. Granted, not much, maybe 1/2 or 1/4 your average mob kill, but there's no reason it can't be another path for leveling. I already get XP for harvesting treasure chests, and that's actually more XP per chest than i get per mob.
ZOS, let's make this happen, please.