I think they actually kinda went the other way at the very top. You had 2 M1A2s, or 2 T-72BUs, or 2 Leopard 2A5s, and if you lost those you were in deep trouble.
But then you had all the Apaches and T-80 variants which were still very powerful and very widely available. It made all the weaker units useless, so you had 200 units to choose from but only 20 of those really were worth it for the most part. I hope that doesn't happen.
Fortunately, things should be a little closer together than they were in WRD, just by the nature of the systems. The closest we'll get to an old-style superheavy is the Tiger II, and even that can't do delightful WRD superheavy things like killing your tanks while driving backwards at 50 KPH.
That's what I'm hoping for. Can a Tiger 2 even go in reverse?