The Scott is a literal squad wipe machine, and the priest can ruin an OKW players day easily if you don't sit it super far away so it's spread is huge. The 75mm Howitzer is also quite good, if not as goo as it used to be.
Not to mention HE shells as well, if your talking non-small arms squad wipe potential the ball if firmly in US forces corner compared to OKW, which has 1 indirect fire unit (The ISG is worse than garbage).
Scott is very good unit, no doubt but in 1v1 Scott may be your third or fourth unit. You can't go for Scott as first one so it can be used only in late game.
What's more, one bad move into Volks areound the corner and it's dead, like all USF' vehicles.
Priest is powerful, I was able to kill even Elephnat with 3 Priests but it has space only in team games. In 1v1 it's a waste of resources. Too much RNG involved, after 1 shell very easy to dodge, very hard to catch moving blob. And like I said, no place for Priest in 1v1. Stuka does better than Priest. So do Katy and PzWerfer.
Priest is only good at killing OKW's trucks.
75 howitzer? Really? You are saying that 75 is good but leig is a pudding? They are quite similar. I find both of them useful tho. Leave it behind lines and you will get 20-40 kills in 30min even without touching it.
Now I have a questions for you.
What is best non-doc mortar? Yes, axis' one.
What is best mobile mortar? Yes, axis' 251.
Which unit has best barrage ability? Yes, axis' Stuka zu fuss.
So please, stop saying that Allies have better indirect. 120 or B4, yes they are better than OST mortar or on map arty but on the other hand OST and OKW jave best non-doc mortar, nad 251s.