Well, you "CAN" consider Higurashi and Umineko "arcs" as an alternative system of "route", since these arcs have a noticeable focus on specific characters. Actually, if you were to add romance or so in Higurashi (something more noticeable than the ambiguous one used here), you can even consider the first 3 arcs as "Rena's route, Mion's route, Satoko's route"
Well, that is even more hard to gauge is Tanaka... the guy promised the scenario will be god-like so