1. I can't split dividends with my wife.
2. I only use a part of CCPC income to live on and leave the rest in the corp, until retirement. I will now be forced to take it out now to avoid a tax penalty.
#1 will cost me probably 5k to 10k a year in taxes.
#2 will be brutal since I can't smooth out my withdrawals from year to year. I'll essentially pay full tax on my business income each year. It will push me into the highest tax bracket some years.