"Damn...they won't mention Unukalhai and Cylva in the MSQ"
they did
"Damn...why i am picking a god if has no difference?" (me a few days ago)
a short dialogue was introduced...still underwhelming but it's better than nothing
"Damn...they never will show Gaia because she belongs to Eden - a side content"
they found a way to make it work and just like Unukalhai & Cylva case, you have an extra dialogue.
I wonder what they want/expect to build from here. For now it's good enough!
In Pandaemonium we had an artifact associated with Seraph (side content from Stormblood), now we have side content from Shadowbringers associated with the MSQ. It's a good base for sure and there is many different stuff to explore. They improved a lot of QoL stuff and added more elements and characters to the MSQ, i don't see like a bad thing.
Additional comments
As for the 6.5 MSQ, it was good to leave the protagonist role to the side and let someone else do what must be done.
The only thing that i would make different is the Twelve. Pandaemonium was great. MSQ fulfilled it's purpose. Island lack in ambition.
Zero grew up faster than i expected but doens't feel forced, to be honest, i envy her. The thirteenth feels more like a exciting adventure than Etheirys, aesthetically looks like Dragon's Dogma.
That's it. EW is definitely worth it. It's a perfect bridge separating the past and at the same time they are establishing a new base for the future (i can't wait to leave the power of friendship behind tho).