LOL... I posted this from my I-Pad, and I couldn't get it to print the 'number 1' properly. Oh Well...
There isn't enough time or space to bring you up to speed on the economics of PBA bowling and why they haven't "won anything". You have to evaluate equipment based on your own experience and knowledge. There is no substitute. That's why I bowl with a mix that also includes Motiv, Columbia, Ebonite and Hammer.
There is nothing wrong with the diamond core. But I do agree they've sometimes gone over the edge a bit with these hybrids they've come up with lately.