It's about timing, and running kids off in June may end up making it more difficult for Hurley to make up for the ground the program lost on the recruiting trail. I'm pretty sure nobody here would have any problem with Hurley having that conversation with a kid in late March or April, as every other coaches does.
Insiders have let it drop that Hurley spent a lot of time actively convincing much of the current roster to stay here and ensuring their importance to the team. To turn around now and give kids the boot at this point in the year after putting in that kind of work is not common, and it's a can of worms I'd much prefer not to open. Again, Hurley and staff have a significant hole to dig out of when it comes to other coaches recruiting negatively against UConn and maligning the honesty of the people in charge. Hurley can do what he wants with this and he'll have everyone's support, but it's not some no-brainer without any possible consequences.