Your thoughts on the Nasdaq 100 rebalance.

I'm lost as to why they would choose to do a rebalance in the way they are doing it this time around.

My thoughts are, for one normal economic cycle would mean that over time the top 7 stocks would lose their position and be replaced with other stocks. As has happened in the past. Secondly, the good performance of those stocks would mean that the index keeps performing as desired to indicate the move in technology. Finally, that the rebalancing would just limit the index's ability to be an accurate predictor of the market's performance – to an extent as I consider the SPY a better measure of this.

I know my view might be too simplistic, so I am wondering what I might be missing here.