So I've never participated in ranked before but it doesn't seem like it would take that much effort to get the Kpanzer 50.
With reward tanks excluded, I imagine the meta will revolve around Super Conq/277/Prog (assuming nerf doesn't hit until after first season)/430u. I imagine Maus/E3 are useful due to armor that withstands goldspam.
What about E4? Yes armor is paper but 375 APCR + turret + enough mobility to not lose out on late game damage farm. Also high caliber HE helps against hull down.
Pearl River coming back into rotation? It honestly looks like they didn't butcher it either... finally a good map addition since Windstorm (yes it was good, meta just went the wrong way first 6 months of the map before people understood how to play it)