This gimmick is lame, I obviously have faith in the people making this to make this comment age awfully but from what I can see... just switching constantly from shy to boisterous then having a predictable punchline come moments later when she's shocked at what she herself did or when others have to pretend like they don't know what happened... this is lame.
At least other one-note gimmicks like masochism, horny-ness, or wanting to be coddled is offset by those things being inherently nice to look at. (its fun to see boobs, cuddles, etc.)
In my opinion, while you could compare this to Suu's boring gimmick with numbers that got old immediately... Suu however is OFFSET by how her hyper-autistic personality is so unique and fun with it being abrasive and cold and uncaring instead of overly doting and dere-dere. This new gal doesn't seem like she'll have as fun a personality since she's just either shy or un-shy- -both of which are generic.