I'm jumping in a bit late in the conversation, but here's my opinion on things. Let me say that I have done a lot of exploring, so I probably have more space than some people that are just reaching the Orc chapter.
Jewess - I had the orc portal at level 4, 20 shroom farms at level 4 each, and 3 rally points at level 3 each. I did not sell off any residencies or culture. I tend to plod along at a steady pace. As I started upgrading buildings, especially my residencies, I had to completely restructure my city.
Draconomicon - The Barracks size is not a factor as far as getting through research or other factors in the orc chapter. As always, upgrading effects the speed that you train troops, but that is the only thing it effects.
I have 4 armories upgraded to the max (level 23). I am still fighting the good fight, but I am negotiating more. I did build a bunch of orc troops, but this is in hopes that they get an upgrade and become more useful. Bobbykitty is correct when she said that you can burn through the orcs quickly when you start upgrading buildings. The armories produce a varying amount of orcs based on the level of the armory. Check the Other Resources button directly to the left of the Coins Storage information at the top of the screen to see how many orcs that you have stockpiled.
I've used a combination of the Elvenarchitect and Excel spreadsheets to plan my city. Both work for me, but I think the Elvenarchitect would be easier for most people.
As far as the pace of the game, I just want to remind everyone that city builders are not really known for speed. There is a lot of collect, reset, and wait, but city builders tend to be a hurry-up-and-wait style of game. As dikke ikke said, you have to play on with the consequences of your decisions. You can choose to speed through a chapter, but I think you miss out on the game when you do so. I am making my way through the wood elves currently and know that I am about to hit a huge wall because of mana. I need a lot of it for research. It is produced at a slow rate. And it degrades every 24 hours by 10%. These are just challenges that you have to face. The events do throw a wrench in things as well and you must exercise your ability to make choices and decide how much time and space you want to devote to the events versus your regular city building.
Regardless of the changes, and there are some I definitely have not liked even though they have effected me minimally, I still have a growing city. I am looking forward to the challenges of finishing the wood elves and whatever else Inno throws at me.