There will be more challenges in the game.. dynamis isn't endgame anymore.. nor should it be considered as such...

I'm certain new challenges and actual endgame will be added by the lvl 99 update...

Who knows.. maybe they will add new dynamis zones geared toward lvl 99 players and we can still enjoy the dynamis mechanic as its meant to be enjoyed..

Beating dynamis at level 90 doesn't feel like much of an accomplishment...

and i feel it would be more productive to spend short periods of time farming relic gear for new players that need particular pieces then move on to more entertaining game content.