For majority of fighting games especially Dead or Alive I prefer if it was done in a more arcade or story mode (like DOA2-4, Tekken 4-6 Story Mode/Arena, Arcana Heart series etc.) since every character has their own backstory, goal, & purpose which the majority isn't going to effect as much of an impact compare to the main character than won in the fighting tournaments or continues the story further. (the ones I prefer longer story mode would be ones with already developed stories, focuses only certain characters, or based off other third party media whether has same story or original)
Dead or Alive Dimensions with the Chronicle Mode focuses only on Kasumi, Ayane, Hayabusa, Hayate, & Helena which actually works pretty well for a bigger story mode (kinda like what NRS is doing with MKvsDC, MK (2011), & Injustice) with the exception of Chapter 3 when your fighting Bass & Leon which part of these scenes began with Bass trying to get Tina to give up her Hollywood dream and Leon was impressed that Jann Lee was strong enough to make it this far which Leon claims he was the strongest which instead of playing as Tina & Jann Lee from their respectful matches like DOA3 Story Mode your always Hayate in those scenes. This where DOA5 Story Mode doesn't work very well when it came to how it was set up which works like DOA Dimensions, but they include scenes & battles that feels like they should've had their own separate Story Mode (pretty much like the older games) especially characters that have their own purposes and it doesn't involve with the 4 Ninjas (plus False Kasumi) or Helena & Bayman.
The Story Mode I would want to see in DOA6 is the important characters or uncovering backstories (maybe Marie Rose & Honoka) would have longer scenes & battles (similar to DOAD & DOA5), while the rest of the cast and plus certain enemies like Christie, Rig, Phase-4, NyoTengu, & Cyber Raidou have story mode done like DOA2-4 Story Mode which mostly involves random opponents having cutscenes between matches whether its just a quick cutscene or rival match, ends by defeating final boss or rival which gets their own ending.