Placing deployments on the battlefield currently (on siege mode) is fun, but is almost impossible unless you have a dedicated team of players, who would be much better anyways if they just threw their bodies into the fray instead. Infact, building contruction sites on siege mode is so close to useless, that your own team will be upset that you aren't meatshielding instead of placing deployments.
It would be a nice breath of fresh air to actually be able to help your team, and see the fruits of your efforts through strategic placements.
Many of us have been hacking an slashing for quite sometime now, and I think this would also give players the oppurtunity to take a break from the quick reaction contact, and be able to think out some ideas to change the dynamics of the battlefield.
It would also put a new use to smokebombs! If the enemy team is building a scarry deployment, you can get a team of ninjas to take them out with some smoke bombs! This will really add some new gameplay features that can help players enjoy the game even further.