We have tactical destruction, so why don't we have tactical construction?

I do agree that construction or rather reinforcing bases would upgrade game play but you usually see this on bigger maps. Although BF6 has big maps I'm not sure they are big enough to support what you are going for. 

With that said what they could add aside from support walls would be for current game bases to not have sand bags or fortifications and instead the player would upgrade it to do so (this would be specific to bases).

They could probably add extra functionality to upgraded bases buy adding supplies creates and allowing players to change class

• Assault - Primary role is to engage in combat with enemies at medium range. Could be able to destroy fortifications.

• Medic - Primary role is to revive and heal teammates. Could be able to build fortifications.

• Anti-Tank - Primary role is to undertake anti-tank warfare. Could be able to destroy fortifications.

• Engineer - Primary role is to repair or destroy vehicles. Could be able to build & destroy fortfications.

• Support - Primary role is to provide suppressive fire against enemies and resupply teammates. Could be able to build fortifications.

• Special Forces - Primary role is carry out stealth and sabotage missions. Could be able to destroy fortifications.

• Sniper - Primary role is to engage targets at long distances. Could be able to build fortifications.

I will keep dreaming about this becoming true in future of Battlefield — expanded class roster with more meaningful role division. This has so much potential, that merged four classes do dilute philosophy.☺️