Dude, even insinuating such a thing is absurd.
Tennis Ace's updates have always been punctual and impressively substantial, and Shoichi's C path is not fluff in anyway whatsoever; it's very different to the main path in interesting and messed up ways, and the new scenarios bring out never-before seen facets of our favorite characters.
Even if Tennis Ace's update pace somehow slowed to a crawl, it'd be a completely different situation than what happened to Blackgate due to the sheer magnitude of unique characters and non-interconnecting stories that the latter offered (you could date basically everyone in town)