You simply have no idea what is actually "lacking" a tool. All the example you have just pointed out are performance issue only. But USF simply has no heavies that serve as a spearhead purpose or Mobile Rocket artillery that serve as a punishment tool for heavy static play in stock.
Want heavies to spearhead a pak wall? That doenst sound right.
If you really want heavies play OKM or SU
USF has a design, respect it or dont use the faction otherwise