Out of curiosity and since you seem to have tested them frequently; what's your take on the carbine-to-garand weapon swap Rangers got with the last patch?
It seems to me that the long-range capabilities didn't really improve too much to be noticeable or useful, while the loss of short-range DPS might have been enough to put them at a disadvantage vs other CQC squads at mid to close range.
I'd argue that this change didn't help the unit, but since I haven't had the opportunity to test Rangers much yet I'd like to hear what others think about this.
Don't play the game much any more but I did play around with un-upgrade rangers when the patch came out.
Don't know how good they were before the patch but in my opinion they are good against basic infantry. Once you start fighting elite infantry, your in trouble and should get Thompson's instead so overall they are not that great in terms of cost and pop if you think they are going to be good at range.
I remember throwing obers against rangers and had them engage at max range vet 0 and 3, it's quite even but would cost the rangers more in reinforcement cost. That's without the lmg on the obers so I didn't bother trying with lmg obers.
Edit: Best conclusion is that un-upgraded rangers are between basic and elite status like with obers, you have to upgrade at some point.