This is quite the myopic and laughable statement.
1) Nobody ever gets kicked out of conferences for underperforming otherwise we would have been booted from the Big East in the middle of the Norm years.
2) DePaul is not in the Big East because they are supposed to be good. They are in the Big East because they reside in the 3rd biggest media market in the country. If they ever do figure it out and become even just decent for a few years, they will provide a ton of value to the league. Rutgers was terrible in both football and basketball but the Big 10 added them anyway because they give the conference exposure to the NYC market. This is EXTREMELY important when negotiating new TV rights deals.
3) Conferences are expanding, not contracting. Whether people want to admit it or not, the Big East is fighting for survival and there's little the league can do about it due to their lack of football. There are a million different directions the college sports landscape can go in the next 5-10 years and it will all be determined by the newly formed football superconferences and the media companies that own their TV rights. Having as many of the top markets covered as possible will be critical and relates back to point 2, you don't boot the only team you have in the Chicago market.