^^ Link above has the entire blog entry, but here is a quick summary of the two changes coming forth with the end of January patch:
1. Fix for the 'disconnect = gone for good' issue.
2. It will no longer be necessary to group with players of 'equal' fractal level in order to progress up fractal levels. You'll be able to choose which fractal difficulty you want to play up to the highest difficulty attained by anyone in your party. Completing said fractal - if chosen difficulty is at your personal level or higher - will up you +1 fractal level. Downside is no matter how high you scale up, your individual loot [chests, drops] will only be as good as the fractal level you are. Fair trade-off, I guess.
Discussion threads about this:
[Reddit] Fractals of the Mists dungeon improvements