The Spanish are undeniably the best Nomad civilization, as their win rate of 65.5% (according to SotL) is unmatched.
Due to this, it’s possible that they might receive a nerf specifically for Nomad gameplay.
One solution could be to modify their construction speed bonus to only operate once they have already constructed a Town Center.
This bonus currently allows them to gain an early economic advantage by building their first TC and Dock faster than their opponents.
However, a change as drastic as this may cripple their gameplay on Nomad, so alternative suggestions are also being considered.
It’s worth noting that nerfing the Conquistador, which is a crucial part of Spanish gameplay, would not be a viable solution.