They don't need to and won't. It was the best conference the last two years. It loses UT but adds Houston, which has been better the last decade or so. Cinci is down but is historically strong, better than OU. Now, take that, and add UConn and Arizona. It just blows the doors off any league in the country. Now, if the people who see the ACC picked apart are right (I doubt it), there is potential to add Duke.
The risk isn't that the Big East will get picked apart, but that in the NIL landscape it won't continue to be able to compete.