I don't think the Department of Temporral Investigations has been sharing their notes though. And there's no guarantee that's true. There are always warhawks on all sides going 'we can take 'em!' and a fleet with substandard warp drives except the new models is the kind of things Klingons might pounce on.
That said I'm still tentatively leaning vertical. Upgrading our fleet is REALLY tempting, but at the same time if I'm understanding this right our trade off is 'all ships now have potential to crash to sunlight out of high warp in emergencies' and that's just unacceptable