Re #2 -- the 09 Katana could be skied with no real adjustment to my technique, whereas the 2010 model took some getting used to. I think it has to do with transition from flats to edges. There is a bit of a delay before the edges fully hook up, and I needed to be more careful about maintaining a high enough angle to keep the edges engaged when I wanted to. So that gives the skis a somewhat discontinuous range of edging when you go from flats to skids to carves. I don't think it's a big deal to get used to, and the 2010 ski is pretty amazing in powder and bumps, were you can do all sorts of fun things. So it's a tradeoff. Just don't expect to get on the 2010 skis and predictably roll them over onto a carve until you get used to the way the edges engage. Once you do feel them out, I think they are pretty nice skis.
Regarding question #1, are you referring to the sidecut of the tip suddenly engaging on the snow when you don't expect it? First of all, the 2010 Katana does not have this problem as far as I can tell, unless you count the initial edging "snap". But once on that initial edge, it won't suddenly engage the tip and crank you into a super turn like some of the skis do. Volkl seems to have done their homework with regards to the shaping and sidecut.
If you want complete predictability, check out the Line Mothership. The combination of rocker, camber, sidecut, and tip shape results in a completely predictable ski from flats all the way through full edge, and there are no surprises or shenanigans. There is no need to adapt style on the skis, and they won't ever surprise you. Only downside is weight, but it's not an issue for lift-served downhill runs. They are not as magical as the Katanas in soft snow, but I think they are an overall better choice if your skiing includes a lot of carving or groomers, or if you just want a semi-traditional ski with a mild amount of tip rocker. I think I mentioned in my Mothership review that they give about 70-80% of the benefit of a full rockered ski with none of the downsides.