Had a quick play with the new summons out in the Vale (no augment summons).
Nothing scientific but here are a few observations.
The Air Ele (VIII) behaves like the old Air eles and anything in range is constantly making knockdown saves. Vale mobs (tested on trogs, spiders, bats, ogres, rakshasa, scorpions, rats) will spend 90% of their time knocked flat. It appears to chase anything not currently knocked down. Very little dps (chain lightning occasionally) but excellent CC abilities.
The Ghaele will win 1:1 any fight in the Vale including named mobs. It's ability to heal outstrips creature dps although that would be different in instances. You cannot target the it while in orb form but if you target it when you first summon it will stay targeted allowing you to watch health levels. Doesn't melee just spams searing light with hold monster now and then.
Fire Ele took out a 4 rat pack ending with 50% health. So it appears that it has normal elemental DR X/-. Will put out significant AoE dps (for a summon).