Well, I know I wouldnt mind having access to some of that stuff personally. But I can see where your coming from. And I agree that it could use a fix,
But I just want to say that Onyx should probably get a buff for their special zone, but lets try not to forget about the rest of the ranks.
I know Emerald and Sapphire have their spots, and Gold/Ruby tree are a thing. I am sure theres likely room for improvement in these places. One of the most common zones that effects the biggest % of the players that I think needs a boost so badly is the ::di . Donor Island hasnt had many additions. The only one I can think of is the Diamond Demon tele and the Black Portal that I cant use lol. A while back the Slash Bash that was located there got removed. Nothing ever put back there to replace it. The prayer altar could use a fix too, like making it able to use bones on it to train prayer! Maybe some sort of teleport portal leading off to some key locations might be helpful. And adding a bit more to the donor shop.
And the other area that could use some love, but its not a donor zone, is Arthurs Dream area. Making the fire able to use logs and raw fish on is a start. Definitely needs more Bloodveld npcs there. Quite a few more in my opinion. Maybe putting a few of those Lava Fire Titans scattered around would be cool. Maybe add some sort of key drop to the Bloodvelds that would enable you to open a special chest located in this zone.
As I said, theres room for improvement in all these spots, show them all some love!