i have never seen isla play as a winger for udinese.
just because you can convert one player to a different position, doens't mean it will work for other players.
Well that's certainly true - although many players, who have both technique, and a solid understanding of the game, are often able to "do a job" at a position, in a stop gap situation.
What's also true, is that *often* you won't truly know whether or not a player can cut it at a certain position, unless you give him a crack.
I always thought that Asa could "do a job" at LWB, although I didn't think he'd be as good as he has been.
Regardless, even if you don't think Isla can be effective at RWF, once Pepe's back we could certainly play 4-3-3 with Vuci/Gio/Giacch on the left, and Pepe/Gio on the right.
I really liked our ability to press our opponents in the 4-3-3, especially on that right side. With Pepe, Vidal, and Licht all operating down the right, you get a situation where it's almost like they compete with each other for who can run the most, who can give the best effort; it's a pretty tough group for opponents to break down (if they can get out of their own half). Definitely good to have options.