I am just considering how would this prestige class work with this new class in town.
What about a 20th level magus vs a fighter 5/wizard 5/eldritch knight 10?
EK gives you access to higher level spells, a +16 BAB, and the full Sor/Wiz list in exchange for worse saves, a painful/dull first 6 or 7 levels, and overall less non-spell options.
On the roleplaying side, you also have a bit more flexibility with the EK I think. You can have war wizards with some weapon training and weapon masters with some magic experience, while this class looks a bit more straightforward.