What I noticed with hour past midnight is increase in damage output, landing more hits, and better parrying. Also, it looked like skills like disarm and offhand worked more consistently. Is this the case?

Or, if we had two human warriors going at with nothing but the same exotic weapon, one with the legacy and one without, would the one with HPM noticeably win?

The helpfile doesn't mention any specific stats. Is this legacy influenced by stats such as int or str?

Thanks.