The proposed changes are neat in themselves and would be Ok for a RPG or small battles tactical system, but I don't find them very fit for Dominions...
It would create a lot of micro-optimizations issues and won't add much to the game. Let's keep Dominion a strategic level game with detailed yet simple combat mechanics (Attack+dice vs defense+dice, strength+wpn damage+dice vs prot+dice) rather than going into Combat Mission type discussion about the penetration of a hurled javelin at 23° angle under rain on a chainmail sloped 15° but previously repaired by a one-eyed dwarf having Earth 2 skill
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