I second the bump: I found this thread again, and was wondering how development was going. Did the SCAG inspire any changes to the mechanics, with cantrips like booming blade or greenflame blade?
I was wondering if you'd consider changing the Aegis of Assault reset time to a short rest. I could see it being done more frequently than once a day.
I'm also curious if you'd consider opening up their ability to prepare spells like a Wizard rather than using Spells Known. Old school D&D had everyone finding spells as treasure, including bards and fighter/mages. Now only wizards have that as a feature, with everyone else just "learning" like the mysteries of the universe pop into their heads. Full disclosure, it's the Eldritch Knight and Arcane Trickster who I'd houserule this for in a heartbeat. I think a Swordmage would be a cut above, too, having a high Int. You've got a great spell list here, of course, so maybe they're just spells that swordmages designed?
Anyway, keep up the great work, and hope you keep going with this.