Atm we need a Lb more than we need a RB. Licht is in a better fitness state than Evra and caceres is also more fit than Asa. Besides, we already have mamy players that can play as RBs, yet we lack left side options.
Aside from the Caceres if fitter than Asamoah suggestion...I fully agree that we have a far more pressing need for a LB. Caceres can comfortably compete with Lichsteiner or at least fill in at RB. He can also slot in at LB yet we have seen him more often as a RB or CB. The fact of the matter is that we have only two specialist LBs in the squad. One is De Ceglie, one of the most hapless players to ever don our colours. The other is Evra, who is rather long in the tooth. It is the only area of our starting XI where we cannot field a top class player in their natural position, in their prime.
Every other position oozes class.
Asamoah is not a natural fullback or wingback. His athleticism and solid technique married to a brilliant engine makes him useful there, but he is not a world class LB. Lichsteiner often is a world class RB. Only Ivanovic seems routinely superior, and he is a freak of a player who can own a flank singlehandedly.
LB is the only position of any formation we deploy where we lack a top class talent.