Not that effective but workable. But you will always be at a disadvantage of not having any ranged weapon skill or not having debuff/defensive skills from 1HS. Poison Arrow/Lethal Arrow/Snipe does absurd damage in PvP from safe distance. Low slash, Pierce Armor/Ransack, Spell Wall are great debuff and defensive abilities which you should not be missing out on.
Kinda pointless. Better to have a back bar weapon that benefits in a different way than your main bar.
Really no point. Any benefit from a 2h can be put onto 1 bar.
Bar another weapon that benefits you