The strong idea behind 305 98 open pattern frame, it appeals to high level players because you can easily beef it up a bit to your liking without making it a rocket launcher (and not using 4G at 28 kilo). At the same time, as a higher-intermediate player, or even just a weekend warrior, you can use it stock, with low tension poly, and expect decently forgiving experience. The only demographics it absolutely doesn't appeal to are 100 sq.in tweener users or flat hitters, who want denser string pattern.
The Extreme Pro isn't beefy enough without customization, because it tries to stay a spin racquet with some control flavour rather than an all-rounder. Radical MP is decent, as is Boom Pro, but the latter just has unique identity, not settled yet. I cheer Head for experimenting and searching, legendary frames get born this way!