My late two cents on this overgrown topic....
Whatever can be gotten optionally with hard work should be allowed in the Cash Shop. EXP Boosts, Upgrade Stones(controversial as p2w maybe, but they CAN be gotten through hard work all the same, it only saves time), Popo Revive Stones, etc.
However, the ultimate LP/EP healing items, LP/EP auto-pots, White Stones, and everything else advantageous that was exclusive to the Cash Shop should be removed, or at least made optionally available through events/zeni shops/mobj drops.
Cosmetic items are fine as Cash Shop exclusive items. Would be hilarious to have SSJ3 hair as a cash shop wig. Same counts for stuff like fast scooters and high-powered fuel, but please give us a permanent option for those rather than just the temporary ones.
1-33 level up stones are fine too, but maybe make them available a few weeks later to prevent complaints about headstarts.