I'm playing through the BBCS Extend story mode on Vita, and it seems I've hit a wall in regards to unlocking Lambda's story path. Internet says to beat Tager's story, but I've completed every possible route, including losing the Lambda fight. Did they change the path in Extend?
Ishiwatari hasn't used a drummer in the studio since Overture. The only drummer since then has been on the tracks Yuhki rearranged for Chrono Phantasma-- Ishiwatari's tracks still use a drum machine.
The one thing that confuses me is that it seems that after Overture, Ishiwatari decided to go back to using drum machines as opposed to getting a studio drummer. This seems like a step back-- it's especially confusing when the tracks that Yuhki arranged for Chrono Phantasma had a live drummer, and then we're back to drum machines for the new songs.
I think if anything the GGXX OST sounds rawer-- it loses a lot of elements that were in the GGX arrangements. For example, a lot of the extra keyboard details and guitar fills in the original version of Burly Heart:
http://youtu.be/dD9b20J2DGk
are lost in the GGXX arrangement: http://youtu.be/NgWYhbTy9qg
It tends to make certain songs more plain as a result. I guess having actual drums is nice though...