I actually do believe him when he says that they're a small company who can't afford to do simultaneous multi-platform releases. In the past, they were able to support PS3/PSV, PS4/PSV, etc at the same time because of resources they were getting from Sony. I'm not just talking about Phyre Engine. My understanding was that Sony was actually paying for some costs and providing support. I'm not sure Nintendo would be interested in extending the same resources to Falcom when they seem to have no interest or capability of cultivating an audience on non-PS platforms (letting external partners port your games a year later is not 'cultivating an audience').
But speaking of that, I am not a publisher or product manager, but maybe it's time to explore new ecosystems when PS home consoles sell like they do in your primary market. Kuro no Kiseki is bombing, straight up. No qualifiers or asterisks. Falcom needs to develop a new platform strategy for their next game because it'll only get worse for them if they continue the course.