Nevertheless, I'll try to calmly explain how things really are. At the same time, I'll check myself, maybe I'm wrong about something.
SoD has many obvious flaws and imbalances everywhere. Balance issues are patched with additional rules, but they still pop up everywhere.
WT has removed many obvious flaws (artifact values, creature costs, creature growth, building branches, etc.), and a series of steps have been taken to improve the balance (not to bring it to an ideal state, but to improve it).
WT, Full-Mirror (identical castles, identical heroes) with new creature banks - is indeed a claim for balance, compared to which SoD (in terms of balance!) is really garbage.
Now, go ahead and argue.