Being completely cold about it - I can still see scope for Barkley and Lamela in the same side - I see Lamela being rotation for Alli and Barkley being rotation for Eriksen (if not further back in the formation).Barkley's assist to Lukaku this past weekend was ridiculous and convinced me that I'd like to see him at Spurs, assuming we don't credibly approach any bigger/better players this next summer (Isco being one...).
We shouldn't plan for Lamela to be fully healthy ever again, unfortunately (fingers crossed that it will happen though!), and should definitely plan to add someone in his position to ensure that we have a full squad to start the season.
I don't really expect us to spend on someone like Isco though, so I think I'd be happy if we were just able to add a Zaha/Barkley type player. Right now I'm thinking I would take Barkley over Zaha. Who would y'all pick between Barkley and Zaha given the choice? Could we actually sign both? Would we want to?
I also think that some might underestimate just how vital Eriksen is to Spurs right now. We are so lucky that he hasn't been injured at all this season, as I can't see anyone (with the possible exception of Lamela) pulling the strings like he does.
If Barkley would be someone that could come on for Eriksen or play in his stead, he'd be incredibly useful.