In the spirit of the post I'll toss my ideas down again.

Reduce Summon 1, 2, 3, 4 casting time to 2.5

Summon 1: Tank pet. Needs to have provoke skill, AoE increase enmity skill, defense buff, and stun
Summon 2: Ranged AoE DPS pet: Needs to weak AoE attack, strong AoE attack, AoE heavy, AoE DoT attack.
Summon 3: Single Target Melee DPS Pet: Needs weak attack with short GCD, Strong attack with long GCD, Elemental Spike that works like Radiant Shield.
Summon 4: PvP based pet that mainly focuses on debuff and crowd control. Reason for this is because PvP is really the only element in the game that requires CC abilities. PvE is based more on two tanks that control the flow of combat.

Remove Tri-Bind and replace it with Contagion, this is a must must must.

Increase duration of Miasma II to 30s

Increase healing done by Sustain and Physick does bonus healing to pets