IMO that's bullshit.
I've been a fan of Blur from Modern Life onwards and own all their albums, but for me Think Tank is their strongest album to date. And if the reason for that is that Coxon had nothing to do with it then so be it. Damon Alburn for me has proved himself as being an extremely diverse and talented musician with obviously Blur, the excellent Gorillaz and his latest project Good Bad (which for me tbh doesn't quite do it, but still I can appreciate the talent involved).
Anyway, I'm thinking you are obviously a Coxon fan, so I can appreciate your sentiment, but imo he is lacking without Damon, hence the reason for the reunion I guess, I hope it doesn't mean a downturn in the music because I liked where they were going.
I'd just like to add that I went to see Blur on the Think Tank tour at the Manchester Apollo, for me that gig ranks in the top 3 gigs I've ever been too and I've been to a fair amount of great gigs in the past. Can't wait for them to tour outside London, hopefully at the Apollo again, good times