Swansea became stronger with the addition of Gylfi Sigurdsson. I have been following his career since his time in Reading FC (the only team I care about in England) and he is a special little player..
Swansea has really good young midfielders, IMO the best young gems in EPL as of now. Joe , Gylfi, sinclair ( good but overdoes sometime), dyer etc. They really have pace as well that creativity that differentiates them from typical english teams likes stoke, etc.