That is up to style. If you're better with 2h, use 2h. 2h get stunned less than 1h It feels like too, so it might be better for you.
And you'll be able to "feel" when you're stunned, you can't attack immediately after a block with perfect timing, so you need to block twice in a row.
And no; more archery wpf is like magic. you can hold the reticule at max accuracy longer, draw faster, shoot more accurately.
WPF for melee does not increase swing speed by very much, it increases it but not to a great deal. at 100 WPF you use weapons as their stats list them for speed and damage, 1 wpf you do 7.5% less damage (1 less power strike) and swing the weapon around 3 to 4 WEAPONSPEED slower, which really isn't a big deal, turning into your attacks and stepping into them is way more important than weaponspeed anyways. Really, as long as weapon speed is over 90 you can't be spammed.
50 WPF does ~3.5% less damage, ~2 weapon speed slower than as stats list it. Which is fucking negligible, we're talkign about swinging 3 Milliseconds slower than a normal 100 wpf swing. over 100 wpf scales the same as less than 100 wpf.
ie; 200 WPF does the equivalent of 1 powerstrike more damage over 100 wpf, and swings a few weapon speed faster.