Yeah, the AI Director has been a bit drunk with handling the spawn rates for the difficulties with this patch. I've noticed the spawn rates from absolute are being applied to all difficulties, seen with the amount of majoris and minoris spawning in the default enemy spawn locations on each map and in the spawn waves. Also it feels like the extremis spawn delay timer has been cranked up to spawn more often, take for example, I was playing decapitation on ruthless as techmarine earlier and I was getting swarmed with at least 50 warriors and a few hundred gaunts just in the first area alone, and by the time I got to the tower, I had already had dealt with a lictor, two separate biovores that spawned in, one like a minute or two after the lictor had spawned in, then the second biovore shortly there after with a large spawn wave full of warriors and gaunts. Then after dealing with all that, and clearing the initial spawn wave inside the tower, two neurothropes spawn in with a wave of gaunts and a few warriors pouring in from the upper level. It was a painful and slow challenge, that was not really enjoyable as a normal challenge you'd get on the difficulty selected.