In my opinion, the Pinnacle is really not suited for winter hikes that require a combination of the following: snowshoes, crampons, trekking/ski poles, ice axe, skis.
Personally, I favor packs with a more alpine- or ski-specific design for winter hiking. Cold Cold World, Mystery Ranch, CiloGear, Backcountry Access etc.
I think storing snowshoes in the pack pockets of the Pinnacle is a poor solution if you're in a situation where you'll need to switch from snowshoes to crampons with any frequency. You'd abrade the pack with snowshoe crampons quickly. Plus, needing to go inside your pack and dig around for crampons is a no go. Switching traction aids is already a big pain - there's no need to make it worse (i.e. take longer in low, low temps in the exposed, windy places you're likely to need crampons).