Well, we will see after Wednesday how many advanced, none paying & conservative spending players find it worth staying? I think these will be the groups that are most affected. New players won't know the difference, and most changes don't affect "high" paying players. For me, I don't spend, so I'll stick around and see if these changes are workable, but if I hit a wall and can't progress, then the game has lost all value as a building game. So there will be no incentive to play.
Hopefully it will work out, but if not, it will be a shame because I do enjoy the visiting races that are introduced [well, except for orcs/goblins, which are soon to be replaced]. If I can't build and fit the new race buildings in, it won't be worth progressing.