Then what made him one of, if not the best RWB in the league at Udinese? Anyway, seems likes he a goner. Marrotta met his agents today. He wants to go to Inter and they want him.
I suspect it was style of play. Counter attacking can make a lot of players look great, for example, Krasic. I think Isla has the ability to cross but he plays at only one speed in possession which is harmful in attack. Lichtsteiner is not great technically at all but he knows when to push the throttle and when to play possession patiently and look for openings in a compact defense.
Isla seems to apply a countering technique even when in possession, opting to play a quick ball and make an off ball run straight into the defence when there really is no hope for a return pass. Also, he seems to lack any nuance around the box in terms of setting up a defender to put in a cross. He tries to just get to the line and cross.