Given a full pre-season, he could become a great player for us. But, so could Dayton on the same wing.
Counter-argument could be said that his injury record hasn't been the best the last year or two, had months here with knocks and niggles, chance to get fit from January to May, which didn't happen fully.
Personally, i'd rather we go for someone more in the build of Montano, but without the obvious problems - there must be better players out there than Worrall, who fit the pacey all out attack winger build.