I just think the way people dismiss Martins as poor without having seen him much is eerily similar to when we had an Aubameyang thread three years ago and literally nobody except Speedy wanted him, because he was apparently a technically dirt poor footballer with nothing going for him except a habit of tapping a few goals over the line every now and then. Poor man's Theo Walcott apparently.
No other comparisons on my part since I haven't seen Martins play much either. But anyone who can beat his man for fun and still keep control of the ball is well worth looking at in my book, especially when they're free and their only competition in the squad would be Alex Iwobi. Also, if Martins is that bloody poor you wonder why Sporting are so desperate to keep him and why he has played so much for Portugal at the age of 23.