I am glad that we got past the theories that is comparable to rocket arty and MHTs.
By we do you mean you?
You are truing to described the Scott as a fragile vehicle, it is not. It actually one of the most difficult to kill indirect fire unit.
The Scott is extremely durable, very mobile while being more effective than the majority of "mortar" weapons having able to hit moving target and having a kill radius of 1.25.
The Scott is great. But the last thing I would nerf is it's durability. Its range is the reason it's durable. Just lengthen the reload of auto-fire, and maybe increase it's on-the-move penalty