With playing the storyline, and having played FF series for quite sometime now, I know two things:
1. To obtain the best there is in game, you have to stray far from the linear game line to find them, and
2. The foreshadowing of what you can obtain will always be presented to you well in advance of when it is actually obtainable by the player.

With this said, I am wondering when in the future we will see the higher level soul crystals in order to break the current lvl 50 cap? I am expecting that it will probably be with the 3.0 game expansion, however, with the current game climate of a every player having at least 1 lvl 50 war and/or magic class, will we be seeing them sooner?

I ask this because of aspects of the game, and the way the job classes seem to play that those storylines are not over. The major kicker is the lvl 50 summoner quest where you see the NPC your working against give an Asisan (sp) 4 soul crystals of summoning in order to gain a more powerful egi.