[Tyrant]

Very interesting, I'll look forward to your progress.

One question i have right off the bat...are you attempting "realism" or is this meant to be cinematic/video game style with heroic action heroes?

With regard to your question about grenades etc., if the basic system is clean, rough edges can be smoothed out by having damage types and limiting the percentage of damage that can be absorbed by vitality. For instance lethal explosive damage could only be 50% absorbed by vitality unless the target can dive for cover, or whatever.