I can't say that I know all of the dynamics of the situation, but the Tottenham situation likely played a part. I think the bigger factor was trying to make Europa more appealing. So the deal was to allow the Europa Champions to qualify for the Champions league and allow domestic leagues up to 5 spots in Champions. It was previously no more than 4, which is why Spuds got the shaft.
So even though their situation had nothing to do with the 2012 Europa Champions, the max of 4 was what got them into Europa not CL. It was definitely a good change - especially in light of the competition this year!