If you like the shiny specialists...

You could even remove the remaining AT-RT's in favor of trying to squeeze 2 more commandos in, potentially by freeing points from the medics.. removing close and personal... but honestly? I think the commandos kinda suck :x
I'd always pick a Arcs or AT-RT over a unit of commandos...

What they need to be usable?
Probably 2 health per mini... Resistance to pierce or at least impervious like arks... the armor upgrade is kinda stupid, just give them 2 shields instead and 1 shield recovery per turn..
Just some ideas... if they'd get all of that we'd probably see the costs going up to Delta Squad levels but honestly?.. I'd prefer these changes over the current discount.. They're just not really usable or at least nothing they can do can't be done better by arcs...

If I was AMG I'd even go further...
- give arcs white defense with surge to block -> equal to scout troopers
- move commandos into special unit slot + the changes listed above -> actual elites like death troopers
- move arf units to support slot and make observe a free action, even if it's reduced by one.. observe 2 is just a aim action...