Relating back to Chelsea, Victor Moses and Maicon would be two very good signings, I think Maicon is vulnerable to pace against him though, so for a defensive option for a Right Back you would use Ivanovic, but against inferior opposition Maicon would be very useful, definitely better defensively and probably attacking wise as well than Bosingwa.
I think if these two signings go through you should challenge for everything next year, although you still have not addressed one key area as of yet, probably the most important, a CM Playmaker (someone like Modric/Moutinho etc.) to link the play up.
Dont think Maicon is that vulnerable to pace. Remember this is a man who everyone was calling the best RB in the world just a couple of years ago. His reputation has taken a hit partly due to Inter's teething problems and partly due to his age.
Everyone goes on about the Bale game but Bale raped him mostly due to Maicon's poor poor positioning. Credit to Bale for exploiting it superbly but Maicon just had a really bad day at the office
Personally speaking if we manage his minutes properly then he can still put in great performances. Main thing for me is that he offers something different as compared to Ivanovic and he is cheap if reports are to be believed