Addons that should have been part of the original programme designed by ZOS:
I just think IMO that certain Addons were not necessary to design if ZOS built them in the original game, such as a better inventory system where one can just glance through the inventory and see whats what, instead of scrolling through it. HP Magicka and Stamina buffs for in combat visibilty , should have also been built it in.
The whole guild traders system should have been a global market and not individual traders.
I know they are trying to get the ESO community involved as well, which is great, but the basics should not be done by the community.