I disagree with this specific suggestion, because sometimes I accidentally have Mog of Ages ready as Starry Muse is ready and want to Starry Muse first to get the 5% buff on Mog of Ages, but I agree that some buttons could be given the option to combine:
*RGB and CMY are mutually exclusive, so why are they 2 buttons?
*HiW and CiB - ditto
*Starry Muse leads directly into Star Prism - I understand that SP is a GCD and SM is oGCD, but it still feels odd that they are separate
*While a Muse is available, you can't recast the corresponding Motif, so why don't the Motifs become the muses? (Again maybe its GCD vs oGCD stuff again, but still)