I think turning game acronyms into names work much better in general with every game as they're more recognizable and role off the tongue better.
>RBGY
ReBuGrYe or maybe ReBuYeGr (Rebuyegr) to role off the tongue better
>GCS
Gosecry, though I prefer it without crystal so then it's just Gose haha
>RSE
Rusaem. I really like this one, it sounds ethereal.
>DPPT
Diapepla or maybe Diapeapla just for aesthetic appeal
>BW
Blawhi or maybe a phonetic spelling of Blawee? I would include B2W2 but then it just gets silly (Blaweeblatwowhitwo)
>XY
well this one's hard, so I'm going to go with phonetic spelling again with Exewhy which I think works really well.
>SMUSUM
already has a good name with Sumo and usum so nothing needs to be changed there
>Swsh
My only improvement would be to make it phonetic again -> Swish

Anyway I think this system works much better as acronyms are boring and unmemorable. It would be nice if my versions caught on. Any suggestions or improvements and feedback are welcome.