I think Obertan has been better of late and I have more time for him now as he is showing signs of improvement. I don't think he took on buttner too much as he is pretty rapid himself.
It's all about confidence with Obertan, just look at that europa league game at home where he beat his man within the first few minutes and then knew he would have the beating of him all night and went on to have probably his best game for us so far.