going double ATG is also very risky, you have micro and turtle around the map alot, very venerable to flanks, arty and infantry and cant cover large sections of the map. Using med tanks is alot easier and less micro intensive in the mid game then going double paks.
What are you on about? A pair of ATGs is standard for 1v1 and 2v2, there is risk to it only if you're lower level player and have no awareness.
Mediums shouldn't be made better VS ATG's that would be stupid. Mediums should be made more effective vs heavy TD's
They aren't better against ATGs, ATGs are worse against them, because you have extremely little time to escape with pretty hefty investment against comparatively low investment.
ATGs hardcounter med armor too well and contribute to heavy meta that way.
TDs have nothing to do with it.