It was different times, aerobatics changed in the 1980s. In 1985 I saw Strössenreuther in his Z-50 and Extra in his EA-230 one after the other (but in reverse order). Extra showed the modern, dynamic style with slap-bang maneuvers, and Strössenreuther tried to imitate that so he wouldn't look unfavorable. He did well but it wasn't the old elegant style. I didn't like the new style, still don't.
Even the clipped-wing Z-526 AFS has a lower wing loading than a pitts byplane, and even the 300 hp Z-50 LS has a lower wing loading than all more modern aerobats. It has even a quite good power loading but still flies different because it's bigger. The Czech invented the Lomcovak as an extremely gentle maneuver with their Zlins. What has become of it?
Our old chief instructor used to taunt that there's nothing to poking in the air with 300 hp.
P.S.: The original's C/G range is 21.5 to 28% MAC.