Here are my top seven suggestions. I hope ZOS will listen.
1. Damage over time skills were over tuned last time. The latest PTS numbers on DOTs appear to be not enough. It should be nerfed further. Maybe 10%-15% more.
2. Magicka cost is getting better. It should be a lot more better if in one rotation, magicka is almost depleted entirely requiring players to spam heavy attacks before they can get back to their rotation.
3. The Nightblade class should be turned into a support/cheer leading class, with colorful special affects that should serve only as eye candy.
4. Soul Trap and Entropy should cost 50% of the current magicka.
5. All spenders or spammables should cost health even if they scale in magicka.
6. Dragonknight DOTs should cost 25% more.
7. Hitting an enemy with Ambush or Lotus Fan should automatically stun the casting player for 5 seconds.