I'm interested in this softshell, but wondering if it is asking too much to backcountry ski, resort ski, rock and ice climb. Would this jacket be better than going with a top o the line hardshell like the marmot exum/troll wall, both of which I already have, or would they breathe better...due to the enormous pit zips.

I've used my Gamma MX for all these things (and more). Of course, anytime you want one piece of gear to cover all conditions, something won't be quite ultimate. That being said, I've never worn another jacket that is as versatile (I've been wearing the Gamma MX for 8 years). If you already have a hardshell, put it in your pack for the really cold resort days, when the MX works great as a layer. You'll get more use from this than most any other gear you own.

This is a great jacket, but personally, I prefer a hardshell when I am on the slopes. The Gamma MX is water-resistant (but not waterproof) so in prolonged rain or wet snow it won't keep you completely dry. It is on the shorter side, and has no powder skirt. It is more of an athletic cut, so there's not a whole lot of room to layer underneath it. It blocks most (but not all) of the wind, so lift rides can get chilly. It can be used as a layering piece, but I would use it more as a midlayer (particularly if it's wet, windy, or bitterly cold). But I still love this jacket (even though I don't routinely use it as an outer layer on the slopes). It breathes really well, provides decent warmth on mildly cold days, is well-made, and has a very useful pocket configuration. It's great for most aerobic outdoor activities, and would likely be good for climbing (especially since it is fairly fitted). But if I were going skiing/boarding with it, I would be sure to also have access to my hardshell.

In my view, this jacket is a little bit too lightweight for resort skiing. I just purchased it this week and have been wearing it in 30 degree weather with an R1 fleece underneath around town (not yet for any athletic endeavours). I would think you'd want a shell over it to help block the wind.