Devs have new guidelines on how to implement features , here is the tidbit on fabled Fabled -Must follow era implementation followed on live as it occured and parses are required for mob stats. A script must be written to add fabled to the spawn group so fabled can be turned on / off as it occurs on live. 2004(GoD/OoW) classic fabled 2005(DoN/DoDh) kunark fabled 2006(PoR/TSS) velious fabled 2007(TBS) luclin fabled 2008(SoF) pop fabled
Are out of era fabled being removed? There were a couple velious and luclin fableds kicking around here or there.
Perhaps eventually , as they are not supposed to be part of normal spawn groups year round . It's not particularly game breaking for the ones that are in as we are well beyond that content / gear