A "lot" is relative. It's only been 18 months since the Cell put Roto-Grip, not on the map, because it had always been there, but on everyone's lips. And it didn't do it with "appearances", that is, a big backend ANd lots of hook. It did it with control and a relatively small hook for an oil ball. So why would the Mutant do it with MUCH larger numbers, when, from everyone's apraisal so far, it does it with a proper increase in those numbers, as it seems you're saying.
I'd rather my ball not look great in its ballpath but in its carry power. It seems the Mutant is progress from that aspect, as no one seems to respect the Cell itself anymore.
The "OOO, Look!" should be saved for the ball used by the bowler shooting 280 with a small hook and backend, rather than the 85 boards covered and the 30 board backend when the bowler, using that impressive looking hook, shoots 220.
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"None are so blind as those who will not see."