From what I read here, it seems the main selling point of the magus, Striking Spell, is a bit underwhelming. I haven't done the math, but it would seem the detractors have a point in that barring certain very specific shenanigans, it's generally inferior to just casting a spell and attacking, or at least not superior enough to make it the main point of the class.
So I'm thinking, why not take the magus in a different direction, one that's less focused on traditional spells and instead gives it various abilities that are magic-flavored without being actual spellcasting? They can still keep the top-level spellcasting they have, but what if you made their class feats be more about doing cool magical things? I'm thinking things like the more mystical variants of the Tome of 9 Swords classes, or things like the 4e Swordmage. The Swordmage in particular had a very interesting blend of magic and fighting, with at-will spells like Lightning Lure (deal a smallish amount of damage to a nearby target and pull it toward you), encounter utility powers like short-range teleports, and limited-use abilities that were a mix of "energized weapon"-type abilities and short-range AOEs.
Something like that would be more interesting than a class that casts the same spells as a wizard and fights like a second-rate fighter. Add in some actual blending of magic and mayhem, and things get a lot more interesting.
