Well, the way I see it that you ethier get the right valve spring for best control and upper rpm power or you run a softer spring for less of that and extended life. Also since a stroker eats up a little duration, it also acts milder due to the increased cubic inches of the engine size.
Valve springs are cheap and easy to change out with the right tools. I could even be done with the head on the engine. Which is a little harder to do in the right spots in the engine bay. You just need the proper leverage.