I would not bet on the Islandia Campus continuing to operate. The facility was designed to hold over 8k and now has less than 1000. It's almost like a graveyard and CA sold the property in 2006 and the lease expires in 2021. I expect Broadcom will pay a fee to terminate early and move the handful of development staff it intends to retain in a much smaller facility, most of them live in Queens anyway
I think it will be a long haul for Broadcom to get value from CA. Even though there is a lot of overlap in the sales, marketing, and infrastructure orgs which can be cut it will take time and money to get everyone on the same page not to mention all of the disparate systems in operating order. Many CA customers have been jumping ship for years and there is no reason to think that will change under Broadcom. Computing has changed and CA along with their technology has not. Knowing the inside of both companies quite well, there will need to be a new mission and additional acquisitions for this to be a positive future direction for Broadcom.