wow its almost like theres a variety of strategies that you can execute now, rushing for your doctrinal mediums, investing in stock light vehicles, etc etc. also in a medium vs medium battle, whoever has better At gun micro wins.
but AT gun to hard to use so i just maek medium tonks.
more seriously: this is true but once AT guns are in the mix artillery (and abilities like RGs) become important, even if they're going to be minimized by the need to produce medium tanks.
this isn't a balance issue, it's just a point combined arms get's complicated fast (as it should).