Here is a list and some description of some things that could be sold that would likely sell very well on the cash shop and not impact gameplay all that much:
- Pets - They can create many pets like dogs, cats, mechanical pets the Engineers can make and possibly even our own personal Bard or “Rememberer” who would be there by our side to document our heroic deaths!
- Mounts - Each race can have a specif mount to the race and then maybe each class can have it catered to them. They should sell the ability to ride other races mounts and sell them in multiple colors.
- Skins - They could sell skins for our weapons, for our armors, and for our off-hands. Maybe even sell some cool robes or cloaks.
- Body Modifications - Maybe sell some cash-shop specific hairstyles, piercings, facial hair and even Slayer tattoos.
- Audio Enhancements - No mobile MMO has really delved into is it worth it to allow players to have different audio on their end. It wouldn’t affect other players but on your own phone maybe the character can sound different, have different shouts or even have their spells and abilities sound different.
- Renaming - The ability to rename your character doesn’t change the game for anyone but its something that every game tends to have in their cash shops.