[ano]

In my opinion, it is a very serious nerf for R'lyeh. Unlike Ermor, they REALLY need that gold as all mages are very expensive and so is research. x5 multiplier is a bit much, imho. I can't say for sure but I strongly suspect that this change will cripple your economy much earlier than the late game when R'lyeh really starts shining. All that chaff is nearly useless unless properly buffed.
It may sound very strange but this change may very well turn the undoubtedly strongest nation into the unplayable one. You may say that I'm exaggerating the effect of this change but my words are only based on my experience.