Yeah the game has definitely gotten a lot easier for me as it's gone on. I was struggling on each and every mission (but winning) requiring very careful and strategic choices before even going in, then the very slow tactic of creeping forward in maximum cover with full overwatch.
But now with Titan armour and Plasma Snipers with squad sight, I could almost rambo some encounters (almost) as a dual sniper squad pretty much act as scouts, and there's little that can take two direct (with criticals) hits from the camping snipers at the rear.
I tend to go in with two assault units with lightning reflexes, a heavy and a medic/support backed with the snipers. Send the heavy and medic forward into a known area and set to overwatch, set the snipers to overwatch and leapfrog the assaults in with run and gun. They'll often startle a mob of baddies, and before the mob can run to cover, they've been wiped out. Then leaves me time to either finish them with the assaults, or set them to overwatch. Rinse and repeat.
I've got to say, I must be the slowest player here - I've played it every day since launch, and still haven't finished it
Only lost a few troops, mostly rookies, but take it very slowly. Looking forward to completing it, installing a mod or two and trying it on a harder level.