I know dbg has talked a few times about trying to find something to add for these old hunters but it's hard with them needing to be balanced for TLP level power as well. But I was thinking that one of the most asked for illusions over the years is the Othmir from Cobalt Scar... So I was thinking, a good incentive for these old hunters is tying an iconic model from each expansion to the reward. Classic > Efreeti Lord Djarn, Kunark > Sebilite Guardian(?) Velious > Othmir(Preferably Chief Kalan with the hat) etc, I'm sure a lot of these would inspire even the live servers to go back and enjoy these zones(for the people that can handle OW hunters...)
I would love that as well! But I'm guessing that DBG wouldn't want to give us access to raid mob illusions
All other hunter achievements just give bags, these should be no different, just give the bags the max number of slots bags had when that expansion was released, we are killing grey stuff and the progression servers can get the same rewards as it won't break anything.