All I'm gonna say is look at KOF 13. Great game, we all know that, but terrible online makes for only like 20 people showing up to most events. Sound familiar?
Even if DOA had better online there'd still be bitching and relatively fewer people going to events. A good connection still doesn't replicate offline play and DOA5 requires essentially a *perfect* connection to be played properly because of how the system works.
They should stop making costumes one guy bought $300 worth of DLC and still doesn't want to go offline. Fun fact: more costumes get bought out than airplane tickets if you want proof look in the costumes threads.
I think one person buying $300 worth of DLC will just lead to more DLC in the future lol. The costumes are not the problem. It's the relative lack of offline support from the community.