The manufacturers will market for the new ball. Just ignore them. They're full of it at the best of times, and this is not the best of times.
It's early days, but I'm not sure about soft sponges being the answer. I use a lot of soft sponges on my BH, and I found it hard(er) to generate power with the DHS 40+ ball. Unless I got a really good contact on the ball, it just dropped off into the net. I had to be really sharp, and it will need work.
On the other hand, it's natural for players to want to claw back some of that lost spin. I think softer topsheets on medium/hard sponges are one answer. The best fit I've found so far is Omega V Pro. Enough power to punch the ball, and the topsheet grip is very, very high. So I might go with that on both sides.
Ultimately, it's too early to say a lot about this. And how many local leagues are going to use the new ball this year? You can't even get an orange version yet.