An all mountain ski is a much better tool for spring skiing than a powder ski. The key to spring skiing is to follow the sun to catch the snow in the fairly brief interval between ice and slush, but it's inevitable that you will encounter both and even when the corn has turned to slush it's only a few inches deep. When all there is slush head for the steepest terrain you can handle. Of course in April in the Rockies you can also find full on winter conditions and powder although the powder will slush up quickly once the sun comes out--that's where a powder ski would be nice to have.
My spring ski is the same as my winter everyday ski--Bonafide. Enforcer seems like a good choice, although I've never skied it. I'm not sure going about 10mm to a fairly similar style ski as your Kendo is worth the expense though. I'd say stick with the Kendo and if you decide you need to go wider go up into the mid 100s with a more powder friendly shape and flex--should be good deals in the spring.
A spring structure certainly makes skiing slush easier but I've always been reluctant to restructure my skis for spring and then have to grind them back next season. Maybe some day I'll have a pair of dedicated spring skis. In the meantime when things deteriorate to grab and release slush---I absolutely hate that--it's time for a beer and a sun bath on the deck.
Unsolicited internet ski lessons are likely to be ignored.
Levy, please listen. Tuned and waxed is different than base structure. All the wax and tune in the world doewnt matter newrly as much as a base structure for warmer, higher moisture content snow. A 1-3 edge tune will get you nothing in slush, but it will be nice in the morning when it's all refrozen and fast. Neither 1/2 or 1/3 help a ski glide well... Re-read about structure until it's internalized.
These are two points of view on spring slush. I hate to structure a ski just for spring, then, in CO, have it be non-optimal the rest of the season.
A spring structure is fairly deep into the base of the ski, in my limited but actual experience. Prematurely aging a ski (if removed annually). (And "daily drivers," to me, last many years if base flattened/renewed a la Jacque vidoes or using ski visions tools (or maybe even the Winterwhatsit machine).
If I lived back East now, or in Calif., it would be different. But here, unless you're a competitive racer and need the edge, I don't think the structuring is necessary if you have the right wax(es). And that's not always easy. Mornings in spring are cold; refrozen. And by 11 or so it's slush. What will work across such a spectrum besides structuring? (Which is actually only for after the slush gums up, and causes those sudden lurches.)
Briko-Maplus Race Base Soft (HydroCarbon wax), with a bit of 60/40 Race Base Medium and Soft combined, with just Soft in the center, 40/60 on the edges. Last spring, for me, no stick until A Basin closing, mid-June. And my base structure is the semi-smooth on it when I bought it (which is optimal for Powder.)