So I like the idea of the Magus as a mixture of martial and magical might, but it's awfully combat focused for my particular tastes, and I often find it difficult to justify giving up all of those juicy utility spells on the Sorcerer/Wizard list.
That got me to wondering; what would be a fair trade-off in terms of abilities if we give the Magus access to the whole Sorcerer/Wizard list (up to 6th level, of course)? Here's my tentative list on what to give up:
Too restrictive? Not restrictive enough?
Maybe the puppetmaster archetype might be more what you're looking for? It gives up some combat ability in exchange for much higher enchantment/illusion DCs, and it also gains access to the bard spell list.
Eh, it looks neat, but it's not really what I'm after. Really I'm just looking for a Wizard-based Eldritch Knight, just single-classed.
Your list seemed like a good start to me - definitely not too restrictive.
Perhaps keep medium armor proficiency/casting, but slow down either magus arcana or the weapon enhancement from the arcane pool.
Take out all of that stuff, swap spells lists, and maybe even add in arcane bond.