It had been suggested and got denied due to lack of suppport. There is no point. If you want to see the squad name, use the players panel. I'm against that suggestion, since it's gonna be useless.
Actually, you can find the Squad name on TAB button, just search it manually, because it isn't neccesary to state the Squad name on stats window. In my opinion, not needed.
Why Group was added in /stats while we can see it in "TAB"? Why playtime was added to /stats while we can see it in "TAB"? What if my "TAB" is broken? Actually I can't use "TAB" as my resolution is always 800x600 which doesn't allow me to see all the name, and my "TAB" is abit broken. Plus searching for it will take about 3 minutes. So adding it in /stats would help and be more easier.
Group name/rank is more important than the squad name. Squad is more like a bussiness, and it isn't really neccesary at moment.