I recently finished reading the New Excalibur run from 2006-2007 and I found it a pretty good read with quite a good depiction of Brian Braddock overall considering how badly he's been portrayed by US writers in general. It was good to see him back as "the" Captain Britain following the previous decision to have Kelsey Leigh take on the mantle of CB in the Avengers as Brian was ruler of Otherworld. Saying that, I do have several qualms with the run which I've detailed below.
It was strange to see a villain appear with the name Albion which is the same superhero name as the one which Peter Hunter has (had?) from the Knights of Pendragon. This was a wee confusing at first.
Kelsey Leigh suddenly had the superhero name of Lionheart, no longer was she "Captain Britain". No mention of when this changed, although I was happy to have Brian back as CB.
Also Kelsey's motivations were not that convincing, I was surprised at how she initially wasn't bothered at hurting others. I can see the hurt and frustration at "losing" her kids, but to allow others to die with no assurance that would bring her kids back was strange
The sudden appearance of Sage and Courtney Ross and the similar disappearance of the latter. Sage appeared out of no where with no real explanation.
Dazzler continuously coming back from the dead wasn't explained or did I miss something or was it explained elsewhere?
It seemed pretty off that their adversaries Shadow X were such a formidable force at first and then they were all killed off when fighting alongside New Excalibur against Albion and his forces, whereas none of New Excalibur died.
Sage infiltrating Albion's forces was extremely glossed over and suddenly we have her fighting alongside Albion. If you blinked, you missed it.
And probably the biggest problem was having Kelsey Leigh tell her kids who she was with no consequences at all. She wasn't able to do this as she would lose them (as originally put forward in Chuck Austen's Avengers run). How was this "upturned"!
Saying all this, I though it enjoyable and not a bad run. The art was pretty good all round. I probably most enjoyed the Frank Tieri written issues as opposed to the Chris Claremont ones.