I agree with you. Disassembled and AoXM are just filler arcs so were X-Men Gold, Blue and Red. Nothing significant happened there.
The significant arcs are usually in the miniseries...ironically...
Marvel has been putting out poor quality in the main books for many years.
We have overlong return of Wolverine, overlong return of Phoenix, overlong return of Prof X....
If they are going to reverse the death of Cable, it makes Extermination series redundant as well.