It started with legion, that horde got better than alliance. Not only for the lower cutoff for gladiators back then, but also because the reworked racials and orc + relentless, which stacked in the beginning, was beyond broken.
But that insane advantage got removed when orc + rele didn’t stack anymore. After that alliance was actually better again, but not to a degree that people would pay 30€ for a character transfer.
With the df changes, the advantage or especially dark iron dwarf and nelf are so massively, that the 30€ became worth it.
Maybe not to a degree of how broken Orc + Rele was back in the days, but still enough to nerf those racials, or finally remove racials completely.
On the other hand, why would they change something that gives them passively a few more million € income for just doing nothing.