You also missed the fact that Sonic Thrust, 2nd in the AoE combo, now applies the buff from Disembowel. So no more having to use Disembowel during AoE to keep the buff up.

Life Surge and Spineshatter getting a second charge is excellent, as it lets you bank a charge for burst windows, and have more flexibility about when you use them without actually losing usages.

Also, Raiden Thrust no longer requires hitting your positionals on Fang and Claw and Wheeling Thrust, and there's an AoE version of Raiden Thrust (Draconion Fury) that you get from completing your AoE combo. It's also specifically a buff called Draconion Fire when you complete your single target or AoE combo, and can be used on either, which means you can use your AoE combo and transition directly into your single target combo starting with a Raiden Thrust upgrade (or vice versa).