I also understand Coleman Fuel/knockoffs, have a much lower octane rating too, not good for auto engines, but should help us get a burner going.
I have had a DF for a couple years now, late to the dance, no issues so far, but thanks for the heads up over the filter.
I have a aftermarket silent burner, one of Gary's (berniedawg)'s Dragontamer caps. It works very well, quiet and the stove simmers very well. I've had the stove poking along simmering a stew with no attention needed, other than to look over at it once in awhile to make sure I could still see steam coming off the pot. My understanding also, it reduces the noise by quite a bit, and maybe a added benefit, reduces stove output which maybe helps with the stove being able to be throttled down and allow simmering at a nice pace.
Last weekend I used my MSR 9 with the simmer plate (medium tin can end), it didn't help much. Ended up having to hold it over the whole thing for the most part.
From my observations, Coleman Powermax fuel canisters are not any better at the fuels not separating than currently available canister fuel. I had issues with my Xtreme stove last year in the fall, I had to keep turning up the valve. I checked things out at home and the stove ran fine and the fuel by that time was warmer. I was bping in temps in the mid 20F.