Just because you don't care for Spectator Mode isn't a good argument for it to NOT be in the game. It's a great way for friends who never see each other to connect in one room, watch matches, commentate, shoot the shit and catch-up, and grow the community in general, bringing an arcade like experience to online play. And now that's all gone, because SNKP didn't implement one of the most basic fighting game features in Spectator Mode.
Will this stop me from buying the game? No. Does it suck? Absolutely.