A change has already been announced by Epic Games for the newly-added Mounted Turret.
On November 15, a hotfix with multiple adjustments for the Mounted Turret was announced by the developer just a day after it was added.
Turret Floor health and Turret health have both been reduced by a substantial amount following some complaints from community members.
The Mounted Turret was added in the V6.30 update on November 15, which allows players to place and operate a Turret in a static location that can keep enemies at bay.
You can view the original announcement from Epic Games below.
We’re releasing a hotfix that has adjustments to the Mounted Turret in Battle Royale.
Turret Floor health has been reduced from 5000 to 1000.
Turret health has been reduced from 800 to 400.
— Fortnite (@FortniteGame) November 15, 2018
At the time of writing, it is unknown if the Mounted Turret will receive any other changes in the future for balancing purposes.
More information on the V6.30 update including patch notes, new additions, and much more can be found right here.