Feedback from users of Mentor Roulette seems to indicate that the i135+ Sync of L50 content is adequate to brute-force most older content at this point.

Compare these two examples:
  • Titan Hard is part of Trial Roulette. I regularly clear this battle either with half the party dead / Landslided, or sometimes after a wipe or two (if the party is really disoriented, or off their game).
  • Ultima's Bane is not part of any roulette. When my queue for this finally popped after 2 hours, we cleared it with one wipe (following an explanation about Aetherial Booms and Tank LB).

As a new player coming from L1-50 MSQ progression, it was counter-intuitive and very frustrating to be given a new quest ("Go kill Ultima again", "Go kill Garuda Extreme"), told by the quest explicitly to use Duty Finder, and then wait 2-3+ hours for a pop (if ever).

I would like to see an 'Extreme Trial Roulette' or similar, that would include Extreme Trials and other previously-difficult content that has now reached a point of being reliably brute-forced due to iLevels, Echo buffs, and community familiarity.

Examples of currently-orphaned content (ie, long queues and reliance on unsynced PF carries):
  • Minstrel's Ballad: Ultima's Bane
  • Howling Eye (Extreme)
  • Navel (Extreme)
  • Bowl of Embers (Extreme)
  • Thornmarch (Extreme)
  • Whorleater (Extreme)
  • Striking Tree (Extreme)
  • Ahk Afah Amphitheatre (Extreme)
  • Urth's Fount

As for the Coils of Bahamut, which are also orphaned, I believe that may be crossing a threshold for Duty Finder random groups without some modifications to 1-shot and partywide-wipe mechanics.