Should the starting hero for Necropolis be chosen randomly?

...Therefore, I believe limiting the spellcasting skill is quite necessary and rational.

To limit the spellcasting skill, everyone needs to play in TE-lite/TE-full mode and disable the necropatch. It's unclear how this works in SOD. The same applies to upgrading vampires and disabling necromancy.
Bai officially plays in TE-full mode. That's why they disabled the necropatch and allowed upgrading vampires.