I thought about that that - my cursory understanding of the Mauser action is that a lighter striker spring may result in pierced primers, because the striker is so hefty (less spring tension lets it push farther forward into the primer). This could probably be remedied by shortening the firing pin a bit, so the extra protrusion isn't an issue.
Or get some Titanium and build a new striker assembly to run with a lighter spring. I'd need Titanium, a mill and a lathe for that. So that is obviously the correct solution.