I can sympathize with a backlash and gone lure with super lines. I can't really address superlines and baitcasters as far as casting goes as I usually don't put the two together. If I did more Muskie casting I suspect I would go that direction in a hurry.

I do, however, use PP exclusively backcountry salt water fishing on spinning reels. Works very nicely. As with any line it is subject to tangles. IMO it is a waste of time to try and get the lashes out with PP. I have never used fireline but if you can get the backlashes out that would be a plus for it. With PP it's cut and re-tie. (Probably needed it anyway). I ALWAYS add at least 3' of floro and if I troll I would add 8'. PP to floro is a bit tricky and can be aggravating at times but if done right very reliable.

I honestly don't see the need for superlines in canoe country with the exception of deep water trolling where the fine diameter of the PP will allow a crank bait to really dive deep. All the rest of the fish I can turn eventually with 6 or 8lb mono. It's not like the salt water freight trains that are going to take you 10ft up under the bushes and you either stop 'em or pop 'em.