I like almost all of the suggestions! There's only a few I'd like to talk about.. The "grindy' skills you speak of (i.e crafting, fletching/firemaking and herblore), having a shop for them would honestly be too overpowered even if you had to be a donator (which is nearly all of the server). If you actually play the game (bossing, etc) you gain so many materials for these skills its essentially free. I'm an ironman and i've got all of those skills (minus herb) to 200m with ease. Making them buyable would just topple the highscores towards the more wealthy players and wouldn't require irons to grind nearly at all for their skills and would discourage wealthy players from buying skilling supplies from the normal players that don't go for 99's or 200m's in these skills. Maybe a feature that lets you craft, fletch, firemake or combine potions faster when you're in the donator zone could be neat, or something along those lines.. so it helps the skill go faster but you still need to acquire the supplies outside of a shop.
Also as realm said, the death talisman takes you right to the altar already, so no real need for another item, however having access to the blood altar via the donator zone would be something cool to see.
