You don’t need to imagine, already exists for many years:
Any 3X
and it never worked (too much vibration, too delicate)
The Onedrop had a great idea with the axis of the project, a smart way to solve many problems for such a delicate yoyo part, the axis.
The Side Effect are among the most useless things I’ve ever seen and used, vary the weight in the only point where it is useless for to change the behavior of the yoyo, the center of gravity … it’s just empty weight.
For the rest agree with Steve Brown and Mullicabob