I think I saw a suggestion that might adequately address the issue. If they implemented the instanced WZ's matched by Valor ranking, all the people that leveled it up the "normal" way would/should be more skilled verses the others. Hence it seems like a natural justice to the people trying to make it big by a bad oversight by BW and restoring balance to the galaxy.
I'm not even 50 (so close though darn it) so I haven't felt the direct impact of this yet, but it seems that people would be far better geared due to this patch than they would be otherwise which doesn't seem great.
Anywho, I just thought I would try to through a possible solution to the "balance" problem that this has caused as I really doubt they will roll back, so what are their other options? Obviously they will fix Ilum, but what about the people that cashed out? I think the Valor matched WZ's would be a great fix (and a good idea anyways).
/rant off.