All the 6.0 Summoner has are fancy animations, everything else needs a complete rework.

Titan, Garuda, Ifrit don't contribute much strategically (they're no-brain),
even though mobility is something nice, here it feels unnecessary and seems outdated in the caster category,
(summoner 5.1 was overpowered, but it was highly mobile without unnecessary mobility).

Here, it almost seems to belong to the Physical Ranged DPS category; it's completely out of place.

Furthermore, the Carbuncle has been reduced to a useless figurine, etherflow management is no longer a true resource management, and you only need to save them to use 4 of them under Bahamut+searing light,
The rest of the gameplay needs a complete revamp, and personally, I believe it needs additional buttons, resources, and a reduction in the GCD between elemental summons because the gameplay is painfully slow, thoughtless, out of place in the caster category,
and especially incomplete.

Even at level 90, it feels like you're at level 60.