I'm not even pinning it on CTM - they've, IMO, hit much harder ever since they changed the delta structure of the portal. I used to play on just as high deltas as now but the second they changed it - and despite that the pre-set deltas now are lower than what i typically played at - it's been rough. You peek your head out and lose 90 % health and I'm seemingly doing less damage to them too (I've ran GM after Ultimate and done the exact same damage per tick to champs, which in itself doesnt make sense). It's the same in Lost Sectors. I'm convinced they messed soemthing up with champs specifically - or that's at least where it's the most noticeable. Needless to say I'm rarely playing pinnacles anymore - it's just become a drag when you have to spend 5 minutes on unstoppables.