the shift to the ARCUS orbment system made it too simple;
This was my primary complaint with CS. It's probably my least favorite of the Kiseki series. Simply because I don't like its orbment system as much. I felt like they actually neutered the viability of arts users, when compared to the other Kiseki games.
CS2 manages to fix that a bit with some better quartz, thankfully.
Gaius could pretty much be absorbed into Rean and not change the game very much. Or vice versa.
I actually think that Gaius was introduced early for something else planned for him in the future.
Lets move forward Falcom
Not entirely related, but I'm believing Kondo's promise that Sen III is going to look much better. Look at Ys VIII for your proof. Kondo's already said that the character models have even been remade.
I keep hearing this as well. Can somebody comment on what made the Crossbell Saga so great?
My personal belief is the cast. You get a small cast of four, immediately off the bat, and get to know them, and know how they work and integrate with everything else that is the giant clusterfuck called Crossbell. Then you throw in a few side characters, and add them in as duology goes on, with those four characters being the 'core.'