As someone mentioned, AVB to Chelsea was too soon for various reasons.
1 - He had 1 years proven record, yes he won the UEFA Cup or whatever its called... but is that really enough to warrant such an appointment? For him personally he would have been better off having another year maybe 2 at Porto, rack up the domestic honours and have a crack at the Champions League.
2 - Chelsea are in transition, but maybe not a firesale transition that some may call for.. ie clear out the vets in a job lot. Chelsea had/have a lot going for them, look at Inter they won it all under Mourinho with their old guard... sometimes you can still get the best out of a bunch that has been together for a long time, there is a cut off point.. but its a balancing act. United are a good example, look at how they have had to rebuild, but still Rio, Giggs, Scholes all have a part to play and they have done that with older players through the years. Chelsea didnt need to phase out Lamps totally, OK he is not the old Lamps but he is still a productive Lamps.
idk, dont really care either tbh as im not a Chelsea fan but they need someone to nurse what they have and introduce players into that, rather than push out the old whilst shoving the new in their face.