On a normal post-ban, you can't have two or more of the following.
A pistol grip
A folding or collapsible stock.
A bayonet lug.
A flash hider. (nor a supressor, because they supress flash aswell)
a Threaded barrel that will accept a flash hider.
Or a grenade launcher.
I think thats all of them.
To put it simply, you can only have one "evil feature. In this case, the pistol grip is probably your evil feature.
They have funny little hook looking substitutes that look very uncomfortable, but they dont count as a pistol grip. So you could have another evil feature if you wanted.
Personally, I think I'll keep my pistol grip.
And you're right, most of the features are kind of trivial. You can easily get by without them and still have fun with your rifle.
But they only passed the ban because they couldnt get something stricter by the first time around.
Personally, I want the ban to die not so much so I can have a collapsible stock, or put a supressor on. I want it to die because it's wrong and a slap in the face to the people that own these kinds of guns.