USBC had no other choice. The balls were found to be out of spec by a percentage that was too large to ignore, and the balls HAD to be banned. PERIOD.
Everybody needs to understand that if the USBC failed to ban the non-conforming equipment, after being made proveably aware of both its existence AND its illegality, they open themselves up to lawsuits by the other manufacturers.
I believe that USBC's hands were tied in all this. They have a concrete rule that sets the limit for manufacturing standards. They could've made it softer by having it worded differently, but it isn't. In the rule, there is no allowance for tolerances above the absolute limit, nor are there any time limits set for it to fall into a statute of limitations type category either. Theoretically, the USBC could go back and do testing on ANY ball, from ANY time period, and revoke the certification if that ball model does not meet the specs for balls manufactured at that time.
Could they have softened the blow considerably by exploring their alternatives for enforcement? Possibly.
Were they obligated to do so? Absolutely not.
I used to be a machinist. I understand exactly how small a variance of .ooo4 and .oo16 are. I am also a practical human, and as such, realize that there are NO humans alive that are capable if discerning a difference that small by ANY purely physical/tactile means. Humans are just not that capable. Not only that, but the difference would be so negligible that the Throbot wouldn't even be able to make that much difference count, and you can tune that thing to the nth degree.
It isn't about whether .ooo4 or .oo16 makes any practical difference though, it is about a concrete rule that the manufacturer was WELL aware of, and one that they decided to push to the limit as best they could. Sadly, their best wasn't quite good enough, and the limit was breached, and the rule was broken. It didn't HAVE to be broken, but that was a risk the manufacturer took. They gambled with a product, and they lost.
The LAW is concrete. You get found in violation of the law, doesn't matter by how much, only that you were past the limit. Even ignorance of said limit is not an excuse, and MOTIV can't even claim that.
If the USBC failed to enforce their own rules against a manufacturer for creating products out of spec, and allowed continued use and manufacture of said out of spec products, they open themselves up to multiple lawsuits from every competing manufacturer in that market.
The USBC, I believe, cannot, must not, and will not change this ruling. If they were to do so, much/most of your sanction money will go to court costs, trying to defend themselves in the resulting lawsuits.
I REALLY HATE THIS FOR MOTIV. And I hate it for the people out there who have purchased this ball in good faith, and now are not able to use it "legally" in sanctioned competition, but that is the way it is, and the way it should be.
There are not now, nor will there be, any winners in this for the involved parties. The USBC will be seen as tyrannical because of its ruling, MOTIV will be seen as untrustworthy and irresponsible, and the bowlers will see themselves as the scapegoats in all of this.
The only winner/s in this are the other manufacturers, and I'm pretty sure this was brought to the light by one of them in the first place. You can call it "dirty pool" if you want to, but if I was another manufacturer and had found out about it, I would've done EXACTLY the same thing.
And so would the rest of you, and you know it. It's a cutthroat world out there, and you have to step up and take responsibility for you and your actions. Motiv's actions were lacadaisical towards their quality control, and now they must take full responsibility for that.