Since EKs are limited to Evocations and Abjurations with their spells (outside of the few freebees they get), you'll want to limit which sorcerer spells can be chosen similarly.
Rather than a simple pallet swap, I'd rather see some different effects. Changing up War Magic, Eldritch Strike, Arcane Charge, and Improved War Magic would really get you a different feel, even though those abilities would work perfectly fine for a sorcerer EK.
I think the EK structure could work well for a Templar (Cleric) and Warden (Druid) as well, but again I'd rather see some unique archetype abilities instead of just using the EK's.