After playing maybe 50-60 hours into a Classic Ironman game, I think I've had enough. There were many false starts and crushing defeats, but slowly I got the hang of things. They slowed down research times considerably more or less forcing you to invest in a lab or two. The DLC missions of Slingshot and Progeny no longer come back up if you skip or fail them. This is something many people have been clamoring for on the 2K forums. But........
It's a buggy mess (on PS3 atleast). I ass-umed it would be less buggy than EU, but I was very wrong.
I won't go into it, but with EU I never ever, ever, ever had to scrap an Ironman game because it froze. I could just reboot and continue from where I left off. Not true on EW. I've had two soul crushing game breaking bugs appear that forced me to start over.
Just today I was at the end of the Temple Ship run and the Uber-Ethereal started his cutscene. When it was over all was dark except I could see still see lifebars of the newly appeared Ethereals and Muton Elites. I saved and rebooted, but it was to no avail. The save file was corrupted.
My advice: don't even attempt an Ironman game until the game gets patched.