I agree it's a bit unfair on team who performed better, but let's realise after the group stages, the Champs League is one big playoff. The big dogs play amazing all group stage, lose 1 game and there out... yes i know its a cup.
They are probably wanting more money and it is daft as you'll have 3 playoff games(2leg semi and final?) then STILL have to qualify for the actual group stage. - but think... why not have the top 4 in the Champs League next 5/6 teams go into a group stage and play each other twice - top 3 go in the Europa league.
I think this playoff business could bring interesting football - but the money involved in the Champs League - surely that competition must stay as it is