To add to what i said before, I don't necessarily think it should be their final single, it just... isn't epic... BUT on the other hand, it has the sound of a "goodbye" or "final single" to it. Also, if they DO get a final album... Maybe they'll end on a high note with an album! (also, hope that Towa no Uta is an upbeat crazily awesome song, better than Ai wa Itsumo.
) Sucks how if you think about it, Tsunku must have written these songs while he was still sick. That means that Berryz's final single won't be a post-sick-tsunku single. ;-;