That's because in order to kill it, you often have to chase the scott back to base on most maps.
Lets take a look, it dies from 3 shots, it is very fast and has rather small target size. If you consider the fact that chasing means shooting on the move in COH2, the amount of shots to kill a Scott can easily go up to 5. You add smoke and you have a cancer recipe, because good luck punishing that. Honestly, you need to be a have a severe acute case of "brain fart" to lose a Scott
Then you can also say the same with the Tiger,P4, 222 and Panther.
P4 at VET2 has 240armor, 640 HP, blitz and you're going to probably miss atleast once as you chase it, so let's say 8 shots.
The 222 with or without spotting scopes can see you coming a mile away once it has vet, sure it's a 2 shot kill, but is also very fast and mobile since the second you get it, and also gets smoke to make it cancerous to fight it.
Tiger has 1k+ HP, 300armor, blitz with vet and smoke, good luck.
Panther is the fastest medium in the game with blitz, 960HP, 260armor and also smoke.
I'm not in favour of nerfing AYNTHING the allies have at this point, I don't know why you are.All of these 4 units I just mentioned have a MUCH larger impact on the game than a single or even two scotts.If we are to nerf another USF unit(make the WEAKEST faction in the game even weaker) then an eye for a eye should be established because it shouldn't be commonplace for Axis to get all the good stuff whilst the allies are left in the dust.