Let's not get too far ahead of ourselves. This is a good trade for you because you desperately needed another starter. Sabathia is on the decline but still one of the most consistent starters out there. Might not give you true #1 starter numbers anymore but his reliability won't hurt your overall numbers as well.
Not to mention that Bailey could easily outperform Sabathia here on out. I really like Bailey this year.
Keeper League:
F) N.Backstrom, E.Malkin, V.Lecavalier, P.Mueller, A.Mcdonald, B.Boyes, A.Hemsky, S.Horcoff, K.Turris, D.Jeffrey, M.Perreault, C.O'Reilly, S.Upshall, M.Erat, S.Gagne, D.Legwand D) S.Souray, M.Streit, A.Babchuk, T.Gilbert, I.Cole, J.Hillen, M.Methot G) B.Elliott, S.Varlamov, C.Ward, J.Reimer P) N.Kadri, E.Kuznetsov, S.Shirokov, V.Tarasenko, J.Blum, OEL, J.Moore, O.Pavelec