Well, here's all I know.
Millar and Quitely did #22 which was uber-cool. Then Quitely was pached for Morrison's New X-Men run, and thus instead of #23-24-25 being done by the Scottish duo, they needed a fill-in crew to do another story while they waited for someone to do the rest of Millar's arc (why the fill-in crew didn't just finish off Millar's arc rightaway I dunno) it was four issues and then Millar picked up his arc with Art Adams for #27-28-29. The four-issue filler, #23-26 are poop. Total poop. Avoid them.
I picked up one issue of the Eye of the Storm Authority which is after Millar, and it seemed poop too.
I haven't heard anything good about the Authority, which is a travesty, but maybe they are good and have had bad press.
So, takes your chances if you want.
