I don't think Hammer needs to move away from that core. It works, people like it, and they keep finding new ways to wrap it. Fine.
I do, however, think that it's hard to continue justifying the premier price point for a core that's been used 15 times already (in fact, the price keeps going up). Of course, it's their right to price the ball as they see fit, and as long as bowlers keep buying them at the premier price point then they'll keep charging the same for it. I just think that it's getting tougher and tougher for pro shops to sell $250 balls, and even more so if there's a perception (real or not) that you're not getting anything new for the money. With other companies recycling older premium cores/coverstocks into mid-price or low-price options, I think it may become difficult to move these pieces from the shelves as bowlers see great values at better price points.