My hope is for something entirely new. Path of the Titans, or some other new form of character improvement. Then in xpack 6 we get more glyph slots, and xpac 7 gives us a seventh talent row.
I don't really see the point of glyphs beyond cosmetic changes, personally. If anything the functionality differences can be rolled into the talent system.
Do no harm, but take no shit.
People who dont like to be sunwelled.
People who like having the option to do something else beside DPS for a change if they get bored
People who dont like queues that last longer than a TV show.
Being able to switch to a healer in BGs to actually help your team win