First season hunting out of a saddle (not exclusively) and like for streamlining profile walking into the brush but its really hard to add layers once you're up. Still playing around with it but may end up being more of an early season deal for me personally.
The majority of the places I hunt are mountainsides and I hike in without layers to avoid excessive sweating. Putting layers on at the base of the tree before climbing simply traps my heat and I'll sweat as I climb. I've found it better to climb without layers, setup, cool down, then add layers.
The main reason for me going hybrid was extending time on stand to all day, but the greater ease of adding layers was a nice benefit. The ability to sit and stand helps when adding layers. Just make sure you find a way to stay safely connected.