They can still soak a lot of damage and dominate medium tanks. You just have to actually use combined arms to support them against infantry/support weapons/ TDs now instead of YOLO charging in and nuking everything with overtuned AoE.
Combined arms to support an expensive lategame heavy unit vs some T0 units, nice.
And dominate medium tanks... At 12 cp U have enough vs medium tanks, if not, the game would be already over before reaching 12 cp.
You build to it have something vs those vet3 inf blobs running around in lategame, and to support your T3 units.