If you try to guess the whole story it is plausable that he changed his blade along with the rubbers he used to butterfly. First the BH to T05, then the FH too. Then the blade to something. It would be logical to use a Butterfly blade that is/was developed to that rubber.
After some research on the blades in the Donic shop and after reading the introducion of the blades I came to an another solution. If I remember correctly in 2014 the 25 year anniversery World Champion blade series came out (Appelgren, Waldner and Persson respectively). These blades are made in Germany, some speculate/claim that they are made by Soulspin. I tend to believe that. So after the introduction of the series shortly came the Ovtcharov Feat 5 ply pure wood blade from Soulspin factory. But there was no carbon Ovtcharov blade introduced, only the "legends" have their signature blades with carbon. So now I see this blade (Ovtcharov Powercarbon) as a gap filler in the new Soulspin series.
So for me the introduction of this blade was necessary in two ways.
Firstly: the manners! Donic has some (older) legends among their ranks so they can make blades with their names. But there is Dima as a future legend, so it would look bad if the company did not produce an Ovtcharow blade with the same technology.
Secondly: the missing product line. So they made a blade, but that was a nice ALL+/OFF- allwood blade. That blade does not represent what a modern OFF blade is today, so they made one with his name. With this poly ball story, the customer/fan is lured in for a purchase.
(I did not mention the Crest series, because they are 9 ply blades and they represent a different product line from Donic (Soulspin)).
- I love soulspin blades I have a Waldner too, the master signed it himself.