Its possible they might remove the cap with the 2nd part of 2.5 as in part with the coming expansion there will be new armor etc anyways not to mention a possible revamp of the ilvl system around 3.0 to take into account the change of the physical levels too. Even if they remove the cap its not like the old soldiery would be come defunt anyways expecially since they can be plowed into the relics.