You're right, he's not the greatest on the ball, and like all centre halfs he drops the odd clanger, but sometimes it's square pegs for square holes. Up against an aggressive physical striker he could do a job. One of the things that pissed me off most last season was the way Ota was brushed off by Costa for chelseas equaliser at ours. That wouldn't have happened with Mangler, and it could be argued that it was a pivotal point in our season.
The previous season, CL against PSG, watch big nose over the 2 legs - avoids Mangler like the plague. I'd like to see him get another chance rather than let him go at a big loss.