I am gonna repost my response from a similar thread about limiting to one Uber per character.
I like the idea but even with just a max one Uber equip limit, it will actually reduce build variety because now you are stuck with one.
3 Ubers allow more combinations than 1 Uber.
The problem isn’t about the limit but the fact it makes the most optimal output to have these 3 Ubers. If we can resolve the optimal output to be possible with one or no Uber, then you can have as much Uber as you want.
With 1 Uber, a lot of builds even within the class are still underperforming compared to S tier builds. Players will still gravitate to the same build (whether it’s one Uber or 3 Ubers)