The corkskrew is definately wrong. The last captain in Star Trek with two-dimensional piloting was Khan ("Wrath of Khan") and that didn't work out too well for him. I can understand limiting pitch axis, but it is too overdone in STO and feels very un-Star Trek-like. Split the difference and allow near vertical pitch manuvers or add a Z-Axis.
Or possibly a combination of both where sharp/lprolonged Y-Axis movement triggers + or - Z to be added. Have the rate dependent on turning rates.