You win the league you go out and make sure everyone will fear you more because you buy some really good players. (You do probably the same when you dont wint it to win it again.)
We were watching as United, Chelsea making their squad lot stronger. While someone at the club was thinking, ohh we dont have to do that, we won the league, we are the best, we dont have weaknesses in certain areas. It wasnt Mancini as he cartainly knew what players he really needs instead of those already in the playing squad and he was vocal about it.
He wanted a partner for Kompany with better skills than Lescott, especially on the ball.
He wanted a midfielder instead Barry with some pace, tackling skill or skills to help attacks. (De Rossi)
Etc...
He hates fast player. Yeah thats why he wanted Hazard surely...
If we just look around how much a good signing can help, RVP-United, Michu-Swansea, Mata-Chelsea, Cazorla-Arsenal, or Agüero last season for us...
There bad transfers all the time, no club can sign 10 payers and having the best of those 10 all the time, Fergie had lot of joke transfers just like Wenger and Mourinho and everyone. Even Guardiola looked stupid with the the bizarre Eto-Ibra deal. Or he spent the same summer 20m pounds for an Ukrainien defender Chigrihinskij if you remember. Then next summer they sold him back for 10m and they were lucky to get that amount back.
I wont blame everything on transfers but others made their squad stronger, got new positive impulse from it, we didnt , our form went worse thats where we are now.