The issue with the double-scott was that it effectively deleted OST's entire stock roster with very little user input, something that 2x Tanks or 2x Rocket arty couldn't do. OST is entirely designed around static units; the MG42, LMG grens, Pak40s (ost's only 60-range AT) and so on, in addition to being designed around small squads (4 models). That faction design against two fast moving, fast auto-firing artillery units that could usually wipe 1-2 models per hit just wasn't a great experience.
That's not to say that current scott is 'good'; it could probably use some adjustments, especially to the manual barrage. However, returning it to its pre-nerf levels just isn't going to work.
This is wrong on many levels. Assuming both parties are of equal skill Panzer IV should come out before Sherman does or at about the same time. If they choose to go M8 Scott first then they leave themselves open to get dived by my tanks. If the Whermacht player has no tanks out on the field before USF can manage to get Double M8 Scotts then he probably already lost well before that point. I personally have never lost to any USF player who made M8 Scots pre-nerf or not. Are they annoying as hell? Sure but so were Soviet Clown Cars back in the day with Snipers in them and people cried nonstop about how overpowered it was yet it never stopped me from winning. It was a L2P issue. After nerf M8 Scott just tickles my units and is nothing but a glorious smoke thrower.
Second why are people making LMG Grens vs USF without grabbing Ambush Camo, G43 or Veteran Squad Leaders? These are significantly more useful vs USF as they can protect your MG from flanks all game while also being significantly more mobile than LMG Grenadiers. If they are spamming LMG Grenadiers and getting owned by M8 Scotts then they deserve to lose. Different commanders are good/better vs different factions (shocker). Even pre-nerf M8 Scotts were never scary because of the timing that they come into play when you are (should be) shifting to tanks at that point. Mortar Halftrack, Regular Mortar, or even Pak Howitzers are more dangerous than M8 Scotts due to the timing that they arrive.
Also remember when USF had double LMG and could throw smoke? (Also pre nerf M8 Scott Period) that never really changed Axis win rates as more experienced players just adapted (and made use of mines for the incoming smoke that would eventually come and Panzer Grenadiers)
Everything you mentioned is basically people who are bad at the game and don't know or want to adapt. The fact of the matter is that M8 Scott is a trash unit in a faction that is poorly designed with an arsenal of extremely sub par units held together by bandaids and no amount of stat adjustments will fix it unless they address the root of the problem which is the poor faction design.