There is a concern here, certainly - a relative has had really bad service from HBOS over the past few years. Personally was very happy with TSB when I used them at one time, but most high street banks could do with a shot of real customer service training. (Except Clydesdale, which is amazing).
But the risk of another Northern Rock was too great - remember that was the crisis which wasn't. NR had the lowest default rate of any lender - their problems were not bad lending, but lack of ability to continue to borrow to fund their lending. Not sure if this is true of HBOS, haven't followed it closely enough, but I suspect it may be a significant part of the problem.
And Lloyds-TSB certainly need to wantch that CEO bonus.