Perhaps. But remember that this is a very complex 3D structure with varying receptor densities, it's not "The Glutamate Level", it's some neural network areas with higher or lower excitability connected to other neural networks.

Just like with ADHD it's likely that medication will at best have limited effectiveness and many side effects.

Certainly, we're at the "bash it with a hammer" stage not ready for anything nuanced. I just wouldn't want to assume that the right outcome is "less autism"; I suspect most people could do with at least a little more!