I think the fact that Zipper/Liverpool/Bigbig's last games were Vita before getting shuttered is a coincidence.
It's clear SCEA have nothing but contempt for Vita backed up by theiir dire E3 showing (remember E3 is just SCEA), But outside the US, Vita's first party support is just starting to pick up. I'd say it's 3 most important western first party releases to date are out next quarter from SCEE. KillZone, Invizimals and Tearaway and I'm sure they'll be announcing more at GamesCon.