We are finally getting the chance to learn our characters in this new trait-tree environment. This is particularly, but not exclusively, true in the mid-level characters who do not have filled-in trees.
As for soloing raids, that is, of course, a shame. I have a lvl95 character and I can't solo a raid. She isn't super-geared in part because I can't get the hang of BBs. So, those that do solo raids are not just high-level but high geared, high virtued and high motivated. For them, I recommend an incremental change to instances only while the rest of us get used to the changes so far.
It's not that we are morons. But we are probably devoting less time and less concentration to the game then are the high achievers. Given a little time, we may be able to close the gap a smidgen.