This question does not seem answerable objectively in its current form. It seems to have attracted mainly opinion-based answers and may accumulate more if something is not done to clarify and refine the question.
Specifically, the OP seems to be asking us to adjudicate a homebrew weapon but without specifically giving us what exact solution / combination of properties they are proposing. So either is is opinion-based or it is a request for us to make something for them, or both.
Am I right here, or off-base?