I still play Presage everyweek. The only reason GM's arent tossed aside is because the drop rates are trash and not guaranteed. If you could get an Adept weapon each completion no one would be farming them as much and GM's aren't even as fun as Harbinger and Presage.
As far as other Characters, Hunters and Titans are just boring to me. I play them on my brothers account every now and then to understand their mechanics to destroy them in PvP but playing them to level them? I played Hunter in D1 for a while but I got older and cant take the whole cape wearing thing seriously anymore and Titans are too bulky for my tastes. No other super is as cool as Nova Warp, Daybreak and Winterwrath to me either.
I appreciate the suggestion though.
Most players have long since gave up on pressage.
If that's your bag cool but I wouldn't set your heart on new secret missions like that every season it's not cost effective.
I would recommend finding other challenges in the game that they do provide