For example, you deploy your bipod ontop a box in crouch stance, and when you raise the bipod it would change raise your stance up a notch. In addition, when raising your bipod it could also raise your stance if necessary. Or just use LCTRL + W and S while bipod is deployed

I'm thinking key bindings like zeroing has could be made for it for example push LCTRL + Q to lower your bipod legs and LCTRL + E to raise your bipod legs. It would also help get your muzzle and scope out of the grass for visibility. This way people can adjust to whichever position they need to get their muzzle pointed at the target. Three different positions for the legs sounds good to me:

I'm sure others experience this as well and i think the logical solution would be making the bipod legs adjustable.

Most of the time when i'm laying down trying to shoot down hill, uphill or the ground is just uneven, the bipod movement restricts me from aiming at my target. All modern bipods allow adjustment of the legs for a correct length, including the bipod models used in Arma 3 should allow it.

Deploy bipod arma 3