The 2.3 campaign seems too slow for me. I'm at january 2085-about 10 months of game time, playing on standard-and...I do about 20 missions per month, my soldiers level like crazy, I make tons of cash by selling alien artifacts, especially plasma blades, since every aliens seem to carry at least pair of those. And...nothing new. Aliens got plasmas, a few needlers and particle pistols, still the same old maps, same aliens, same UFOs. I don't even have anything to research, just waiting for Shevaars, XVI or particle guns.
A bit less missions would probably help, at this rate it just gets annoying.