Lamela looked good whenever he was involved, Walker barely acknowledged his existence and instead spent his time whacking the ball into the sky. Eriksen will give them a huge boost of creativity and be the #10 that Tottenham so desperately need for their attacking play.
Holtby-Paulinho would be a true workhorse partnership in central midfield, I know Holtby mainly plays as an AM but with his workrate and box-to-box style he could partner up with Paulinho very well. If not, Sandro can fill in nicely.
I'd play this lineup:
-----------Soldado
---Sigurosson-Eriksen-Lamela
-------Paulinho---Holtby
Rose-Vertonghen-Chichires-Walker