Abidal is a top LB. He is and always was better than Evra-who doesn't even compare.
That is for all those that have been promoting Evra the last couple years.
Abidal is much smarter and he can actually defend. When Evra is on the field I have no idea what he might do, (erratic defensively) which is a bad feeling to have about a player. Also, Abidal is incredibly athletic (I've yet to see someone match him for pace), his speed and strength allow him to catch many mistakes we make defensively before it is too late. He does get beat from a static position at times on the corners of the box which can really hurt us but he has improved on that somewhat. All in all, Abidal is the business at left back, in my opinion.
I agree about Abidal's intelligence and speed. However I also think that he is by far the least skilled player in the Barcelona first team squad, and you can't rely on him for anything more than running, the 80% good tackle, and the clearance. But he's also very mistake-prone (hence the frequent cards) and as long as he doesn't have to pass, cross, dribble, he's fine. So imo he is not a top LB.
BUT
That's by sort of general standards. For Barca criteria, however, he's perfect. Because all he does is run, tackle and clear. And that's
all we need at LB for most matches. On the right we have Alves who plays as a RW, and we would be so vulnerable if nobody did the dirty business on the left. They can attack down the right but hte whole 3-man defense will just shift over and do the clearing. We wouldn't want a skilled Abidal staying in the attacking half, leaving the back 2 exposed. And we wouldn't want him to be skilled because if he were he wouldn't resort to punting the ball. Which actually relieves a lot of pressure off the defense and the team as a whole. So for Barca he's a top LB.