You can't beat +h2h skill. It trumps all other mods and no other weapons PUP can get, barring mythic, compare to Oberon with a good +skill on it.
Weapon skill level is a very significant stat. To treat h2h skill like +acc/atk is to treat STR as just +atk. But no one would be stupid enough to say +10 STR is as good as +5 atk/+5r.atk. I'm pretty sure everyone knows +10STR is better in every situation.