I think it's a fantastic improvement. Although I never used he favourite feature in version 1. The night mode is stunning, as I find the iPad brightness never goes low enough in a dark cockpit.
I find the new version running same speed as the old. But then I cut n paste flight plans from email.
Overall the improvements certainly outweigh any shortcomings. Especially the new Flt plan that doesn't delete all after an airway/waypoint it doesn't recognise.