I haven't been keeping up with this conversation, but it occurs to me that maybe the resonance issue with the Alchemist is being handled wrong.
I like the idea of using resonance points for Alchemist abilities, as it ties in with the idea that the alchemist is the magic item specialist. The problem is that the Alchemist simply doesn't have enough Resonance Points to perform both Alchemy and use magic items.
As such, would it be too game breaking if we just allowed alchemists to get extra Resonance Points to use as they please?
I am thinking that we go with +1 resonance per level, so that they can pick up a pool of resonance points quickly. This is in addition to normal resonance progression.
I would even consider that rather than replace Charisma with Intelligence for gaining Resonance, they ADD their intelligence bonus to their resonance pool.
The idea is, I think, that any character wanting to focus on magic items becomes an Alchemist. They can then look towards the multiclass dedications if they want to specialise in magic items for a specific class - say a fighter or wizard.
Alchemists still have to make the decision between investing in items and uses of their abilities, but this seems like it is a decision that the Alchemist should make, much like the decision between reserving uses for QA and preparing alchemical items.