Primal: alot of good suggestions are already out there. A single direct-heal line like revitalize would help Dragons a ton. A "Gold Rage" type ability for spellcasting would be more than fair.
Honestly, I'm not sure Dragons should receive a castable rez; they're masters of Primal, *not* masters of Life; if they were masters of life, they wouldn't have lost Draak Colony. I'd rather see their offensive power boosted; Dragons, right now, are simply not something to be feared in battle. Dragons should be good to go with 4 AEs + Lunus/Helian breath weapon (long timer as it may be); I'm part of the crowd that would like to see an augmented Burning Embers: +hit, chance at a direct-DoT and turns flame breath into an AE.
As far as buffs, since bipeds get gift of speed I'd like to see Velocity added to Dragon's Gift - I don't think that would be unbalancing, considering my biped can top >145 Speed (with road bonus) under the right conditions. Then add two other gift spells: Gift of the Lunus (+str/dex/health) and Gift of the Helian (focus/power/armor).