If you mean CM10 is so good you wouldn't want to come back then almost yes. It is unfortunately useless for games. If I wasn't a gamer then I'd be definitely using it.
Repartitioning the SD card is for creating Ext partitions. You can use a card reader and windows partitioning program for this. Just make sure you set it as a primary partition.
This isn't related to your TPT sizes. To set those up use: https://play.google....horas.tpthelper