I have only played a couple hours but have a few items to note:
Recommendations:
Having the ability as a solo player to view party character inventory side by side would be helpful it was a pain to click and drag one item then hover over portrait in inventory click little red arrow to next inventory screen then drop item and rinse and repeat.
That's actually solvable, but a bit glitchy in it's current state. If you hit I twice it will bring up both windows directly on top of each other, so just drag one to the side to see the other. Or you simply use the small buttons on the icons, I don't really remember how I did it but it's doable.