Hm... I totally get what you mean! I'd say it depends on your play style, if you want, you can be balanced and use say Squigly or Peacock for distancing, or use Big Band / Beowulf / Cerebella for hard hitting attacks, though you'd be slightly at a disadvantage towards distance gaming.
If possible, could you describe your play style? What's your sort of preferred fighting method say for? I may be a new member on the forums, but I doubt there's nothing some old fashioned tailored gaming can't help!
God, boy do I filia-you (I can just feel the skull heart finding me worthy) but I totally understand, I haven't played the game since it was on 360 and my fingers aren't well adjusted to keyboard moves (I do got mobile though, so, i'm compensating) but I think @Hiroprotagonist is on the money on using Filia! (I'm not sure if she received a buff yet though? I remember she was great at rushing, but never really able to lay down a smackdown loli don't know how to describe my play style, besides in this period i don't play so much i regret it. i use double very frequently as assist (hornetbomber H) and than i start do combos with Val. when i use double i start with the grab and than i start doing combos with her; i usually don't use valentine as assist and if i do i use valentine to stop enemies' attacks. "poor little girl" quoting valentine
p.s. anyway i am not so good at playing skullgirls