While I agree that the OW has precluded the need for many of the "rare" SV mob's...I don't know if removing them is the best case and order. Quite possibly that entire area should be rethought or retasked in how and what drops the pages so lower lvls like 60's can get them, not just upper 80's.
This is something that would require some thought, maybe make 4 star boars/faeries/wisps drop pages as well and put the rare drops back to meteroic weapon drops (that now seem super hard to finish with atrisal not dropping the gold anymore much). Like I said it needs thought, and I don't have enough to contribute but I definately agree something should be put on a table soon to address it.
Till then, you have alts, just clear the area make it more livable in for lower levels on Morrigan
Rhiannon :p and Dreamsongs drop pages, not sure on the blue or red wisps. I think it's a bit silly that you cant get the skills through the start quest or a vendor.. Although it adds some excitement, Books of Alteration are inevitable when you get the skills (quite clever how it was done :p).
My solution would be to remove any of the 1* 2* and 3* Xs mobs, maybe leave in the 4*s.. But then, which toons still training in stonevale are going to be able to take a level 90 4*? So probably get rid of the 4*s too, and just leave in the 5* wisps..
I agree with Gold Ingots being hard to get now.. Maybe if 4* 'rare' stonevale mobs stayed, they could drop Covers and Bindings and give Atrisal a better chance of dropping ingots? Or allow the 5* wisps to drop Golden Ingots.. (would make sence).
Anyway, something needs to be thought out because it's not fair on the lower levels
so insted of takeing them out why not reduced their spawn time like 5-6 per day or something like that