As the title, my suggestion is to change Earth Tower so you can do 8 parts of it per week so that in theory you can play through the whole Earth Tower in one go if you wanted.
Reason: The rewards aren’t very good anymore, so it doesn’t hurt the economy to have them multiplied by 8. The only reason to do ET now is for fun and some attribute points anyway. ET is a great experience for new players, but they would need 8 weeks to just see the whole thing. In 8 weeks they already hit endgame and ET is pointless.
In short, it wouldn’t hurt anyone and would allow new players to have some fun.