Batshuayi is too selfish, he doesn't pass enough and tries to take too many players on. I guess Poch could coach that out of him? I don't see us buying him to be honest, he's going to want someone more malleable.
Without having seen Alli play in League One, given he started his Spurs career nutmegging Modric and has since done it to half of all PL players, I'll take a stab and guess that he took on too many players in League One. The trick isn't coaching it out of the player - like Mourinho did with Cole and Hazard - because it'll take the natural edge of their game, but coaching them to do it, the right amount of times in a match and at the right times/in the right areas. And yes, Poch can do it, just as he's done with Alli