I learned of a way to set up sandbags with an eye-level murderhole and a sandbag set behind it at the perfect height to set up a bipod. The only issue is this takes a lot of set up time and can become difficult when other players get in the way.
To solve this, I think it would be great if there were large blueprints that included multiple parts at a time. They could simply be set in a layout and built manually by other classes or placed part by part (not the entire blueprint at once) as the cooldown allows for the support class.
These could include sandbags with bipod mounts, hesco bunkers, hesco towers, foxholes and short trench lines to name a few.
I really enjoy this game for the building aspect but I still find it tedious and futile considering the pace of the game. In no way do I want it to be fortnite level of building but I certainly think at this stage of the game there simply isn't enough time to build.
I am not a fan of the big blob mentality that moves from point to point leaving the previous one completely undefended. I realize that implementing this alone won't solve the blob mentality but I think it would certainly change things if players had more incentives to hold positions.

Hold on fellas, the day is coming. Until that, stay well 