The number of slots really sucks.
The higher ur int the higher the memory the more abilities u can use - in theory only though since the slots are limited to 8. so basicially 7 skills + bandages.
This makes the memory really pointless. ESO did the same, limited the slots too much thanks to publishing for consoles. In my opinion this makes mmos really bad.
The limit for using abilities should be a players skill, not the UI. This makes games just more noobish