You're not wrong, I agree boss drops that are worth alching could be noted & x2-5 instead of a single Rune Platebody for example.

Seeds, noted logs and what not could be like, 7 seeds instead of 1-3 - 250 noted yew logs instead of 50.

Trading in skilling uniques (Rare Fish, Agility Tickets&..) why not have them for coins & XP,

Slayer Tasks should be replace-able by the Lower level Slayer Tasks, if ur on Hard > Medium, if medium is bad too > Easy
If easy is bad too, the current system will push through.