It's a shame but as fans, I think we tend to look at a player's weaknesses more than his strengths.
I've thought for a while that Gael is a good defender with great pace but offers very little going forward. On the other hand, Aleks is very keen to get forward and can produce some brilliant passes/crosses, but is too easily beaten as a defender and can be found wanting positionally. When Zabba plays, I always expect any goal conceded to come from the opposite flank.
In the way that this City team plays, a fullback needs to be able to be as effective going forward as he is in defence.
There's no doubt that Aleks has improved his defending this season maybe giving him the edge for left back, so how great it was to see Gael going forward with purpose and to great effect yesterday.
There have been lots of comments on this forum about players' improvements over last season and that MP should be congratulated for his impact. Whoever is responsible, it is great to see, and if Gael has been given the confidence to make a contribution going forward, it is likely to improve his defending too and maybe we don't need a neew left back after all