I bought this at the weekend. I’m quite inexperienced, just 152, 172 and 208 for the most part as I learned the basics.
I too found it very twitchy at low speeds coming in to land. I ended up just flying circuit after circuit at my home airport, practicing takeoffs and landings, finding the right speed. I find that when you’re not in AP, it needs a lot of attention - constant, small corrections of rudder, power and trim. When you get it right though, you feel you have accomplished something, but should it really be this twitchy?
There’s a hell of a lot of info here on the forum about the handling, but seeing as there’s been a few updates, I’m not sure how much is still relevant. I’ll stick with it though, the devs seem to be responsive and I’m sure the problems originate from trying to create an accurate replica of the aircraft data within a ‘compromised’ flight model.
I have experienced your problem with VS mode intermittently, but not with the Kodiak yet, possibly a NXi glitch?