Versus hasn't really had any more irregular a development cycle, it has just been constantly interrupted by Square Enix execs putting the team to work on other teams' projects since THEY have screwed up (not Nomura's team). The game was announced way too early and they've apologized for that, but after that the development has advanced as any other game's, except with the interruptions.
That sounds like the very definition of an irregular development cycle.
Is anyone even working on Versus right now? Do we have an ETA on a playable demo? Is there any reason at all to believe that the promises first made over half a decade ago will actually come to pass? Has Square given anyone any reason to have faith in this disaster of a project?