Resonance to limit the number of how often you can use a wand or activation ability of magical items per day makes sense. Using it to limit consumables not so much. Unlike endless wand charge spams, consumables are already limited by their one use and gone nature. They don't need another arbitrary limitation.
Freeing up consumables from the resonance cost might fix some issues the alchemist has right now, but this will require some rebalancing as well of course.
Wand charges are also one and done. They cost less because fewer people can use them.
The only thing Resonance needs to work well is to bring back short rests or stamina or any other mean to heal out of combat, otherwise if you cannot even drink potions to heal you NEED healbots and even with them your adventure days will be 2 encounters. Without healbots you'll probably need to do long rests every encounter which makes no sense to me as it force people to spec healers just to keep the party going for one or two more encounters.
5e nailed this perfectly with short rests as HP and some cooldowns are recovered like that and while it makes sense to catch your breath in a dungeon it does not to sleep 8 hours in it or exit/re-enter, which screws up the adventure forcing the DM to respawn mosters or hazards.