The Church has always said that active homosexuality is a sin. But not necessarily homosexual tendencies. Ending that distinction would represent a significant crackdown on gay men in the priesthood. The Vatican will not end this distinction. But it will recognize the truth - that it is highly imprudent to have all-male seminaries and an all-male priesthood, where men live, work, shower, and sleep together, filled with homosexual men. And it will recognize that it is highly imprudent for homosexual man to be given access to teenage boys in close quarters.
Seminarians don't "shower and sleep together." It's not the Army. But you're right, they do everything else together and establish close bonds. Putting sex into the mix is asking for trouble.