I think he's good enough to play, not just train. Did any of us expect Trent to make it so soon? Or Gomez to establish himself as first-choice CB this season? Young players tend to develop quickly; this guy has scored 6 goals in his last 7 games in the Championship and none of these goals look like they were going to be prevented by EPL keepers, those were all real quality strikes.
He is not a finished article, obviously, but because of the goal threat he can probably give us more than Lallana at this point. For fucks sake, as we speak Mane has a cut on his foot and we have literally no one to play on the left wing against Bounemouth – it's either going to be Origi or Firmino (who should really be rested) playing out of position. As long as Ox is injured, there will be plenty of games where a player with his versatility could feature.