Only landos really make that objective tough, imo.
Maybe add a turret or two with cover and/or add some cover for the offense to be able to set up an eweb/rocket spam.
On the subject of maps in general...
I see a ton of discussion about where the defense spawns in relation to the objective, but I think it's more about both.
They should both either be really close or really far from each other.
If you think of hoth....or any other base map, really...
The Offense starts out pretty close to the objectives and gradually gets farther as they go on..
The Defense is kinda right there on every obj except for maybe codes/cc...(blue/red on korri or stations/parts on des.)
~archi