You seem to not have reading comprehension.
When the hook is so buggy that it has a 50% failure rate, and over 7 bugs attached to it that cause it to drag Widow to unwanted places, and can even be the cause of her death?
No. Giving her a reset-on-elimination wouldn’t be OP in the hands of a skilled player, because half of the time, it wouldn’t even work as intended.
You seem to not be well versed in Widow’s grappling hook bugs, so let me educate you on that.
The only conceivable way that it would be OP is if the damn thing actually worked properly.
And even then, it’s very arguable because barriers are mobile, can be repositioned at will, and hardcounter her shots.