If I am interpreting your question correctly, it boils down to something like
"If someone has a muscle that can be stretched further, would it have
less explosive potential?"
Probably not. Even if it does, the effect is likely minimal, and the injury protection benefits you get from staying flexible are worth the slight performance decrease....
No having active flexibility will not slow you down. It strengthens relevant muscles in the lower body (all of them).
Active flexibility is like weight lifting. Your dynamic stretch is plyometrics. They're complimentary and you will get more results together than individually.
Here is a study ...