I find it too slow as well, but I keep telling myself that it is for the best.
In Beta 3, by turn 100 I had often eliminated 5-6 nations by conquest. Once I had a population 1066/production 366 city by turn 96.
In Beta 4, one could get insane production really quick. Once I had a city with production 140 by Turn 35. It had been founded on turn 16.
Clearly, the developers thought that was too quick. There's no argument that it has been slowed down A LOT.
Right now, in .982 my best city puts out 40 production on turn 40.
But, I am happy with that city, I am happy with watching my Empire take off, and am starting to enjoy the new pace. The key is to have something to do while your cities are getting off the ground. If you have a sovereign that can run around and kick ass, you may be OK with waiting.
I'm actually afraid that Stardock may be chipping at new players enjoyment a bit too much. Production is being slowed, which pushes trained troops further in the future. Unless a player can field superheroes, they maybe stuck.
If you waiting to research Training and Leatherworking, so that you can spend 10 turns churning out a spearman, while Slags are knocking down your cities, "Enjoyment" is not the word you will looking for.
There is one thing that Stardock must have before release, or the game will crash bad burn:
No Shrill Lord should raze a city on turn 100 on Normal map difficulty, even if the player lacks Master scout, has founded it on the border of Curgen's Tomb, and has had a pioneer lead the Shrill Lord to it.
The above happened to my wife. She has not played since.