Duty finder needs to be a bit more flexible on roles based on the dungeon / trial.

[AdvancedWind]

Well simple solution is to build your own party on your server (use FC, LS, or friends) and this allows you to use whatever setup you want. It also allows you to consistently use the same party members (re specifically replace ones not ready for titan) and ensure you make progress rather then starting over at random via the duty finder each time.

I know you can do that. In fact, I do that. But, just because "You can make your own parties" doesn't mean that the Duty Finder can't or shouldn't be improved, so it's a really bad argument that sounds like "You can't easily compare gear stats, but you can write down your current gear stats and then compare to the new, no need to improve the UI". Also, as I've mentioned, Titan is not the only example where the party composition is subpar, just the most obvious.