I did the new Fractale on 25/100 and tried the cm (we failed the second boss mostly becuase our party had a bad class setup).
But I think the fractale needs a sligth nerf especially on lower levels. 25 feels just the same as 100 and in generall 25 (and maybe 50?) feels out of sync in its difficulty compared to the other fracs. I would suggest to just remove maybe one mechanic on the second and last Boss and give them less hitpoints.
The higher levels seem fine so far.
In generall I would like A-net to wait for a month to see how the community deals with this fractal after most players actually know it.