Do away with the skill books

They just take up space and there is really no need for them. Just have a drop down menu with a price for each thing you want to learn. This would also cut down on the amount of shops needed, making room for more future dungeons.

This is a QoL change that'd be nice, visiting trainers as opposed to a vendor. Could also be worked to get around the very boring job of buying book > leaning book x120 per char. Obviously keep the rare spellbook drops, god spells, GiD, unlock, dopp etc etc. Again though, it may be worth just doing this with the new client which i assume you were already going to do anyway and concentrate on more important gameplay features than QoL.

I don't know, maybe add book quests back. They give people something else to do and the quest items were fun to keep as house deco.

You can still do book quests, they aren't removed

I thought they were removed, will look into that, thanks.

When the towns were revamped and certain NPCs were removed/replaced, there were many book quests that were unable to be completed because the NPC in the chain was gone. Since the town layouts have been reverted, I am assuming that all the "broken" quest lines should once again be functional.