Do you mean the "D211"?
If so, that slippery, mushy squirm-until-warmed is inevitable with any brand's treaded (over here "D.O.T.") race-spec tyre. Pirelli, Michelin, Bridgestone equivalents all seem to exhibit this.
So you have two choices: Allow them to warm, or use warmers.
Like you, I'm not a fan of hassling with tyre warmers just for track days. I actually prefer having to warm the tyres a little gradually (2 laps typically, maybe 3 on colder days - which isn't too cold here ...), allows me time to get into "the groove", if you know what I mean.
And while they have the minimum road-legal amount of "tread" (siping), I don't street roll very often on DOT race tyres because of inability to maintain consistent heat in them to be effective.