considering how many times they changed up the whole thing by now i am actually not too concerned about "too late"
the whole "ground combat" thing has been announced around 2 months ago if im not totaly mistaken.

The idea of infantry was not that its a cheap unit type.
Ive quite clearly discribed them as a squad based unit.

In that case there is no need to nerf neither cost nor effectiveness.

On the point of larger than life battles: thats not what it looks like.
through the abundance of reference points such as ground soldiers it looks like a bunch of toys thrown together, especialy with the dragon beeing that huge.