This doesn’t actually work. Teams can launch other projectiles across the field such as chain, smartcord, or the stretchy tubing (I forgot what it is called).
Teams just wouldn’t launch until the 2 seconds anyway leaving no time to enact anti-string strategies. Also, respooling the other teams string would just make cleaning up after a match even more of a mess and lengthening cycle times even more.
The only way I see GDC “solving” string launchers is by removing endgame entirely, which would suck and have a whole host of other issues.