CPs are slow..slow..slow. You spend all day retrieving.
That slower retrieve of the CP has without a word of as lie caught me at least one and sometimes more fish for every weekend I fish up at the Thompson. It wasn't as many times this year but in the past usually 15 + days a year. My buddies who fish BC's never hook steelies on their retrieve because its way too fast. I'll take those "bonus" fish any day over a faster retrieve...besides that extra reeling helps to keep my hands warm.
Also, when that thermometer dips into the-10 or colder range their BC are constantly freezing up (doesn't matter what make or model) and that can ruin their day....that NEVER happens to a CP which has far fewer parts. When it comes to casting distance with a float setup, I can get it out just as far or further than most because I'm fishing off a 12' rod whereas most BC tend to use 10'6" rods, which makes it even tougher when you have 7-8 or more feet of line between your float and lead which you need to do in certain runs.
And puttting the "fun" factor aside when playing fish on a pin... its also far more effective when playing fish....you can play the fish better when you are supplying the right amount of drag at all times. Guys who know how to use them lose less fish and can get the fish to hand much quicker which translate into less stress on the fish and a far more successful release.
BC's are great for spoon fishing or bottom bouncing deep holes if the bottom is good enough to do it. I even prefer to use them when chucking blue foxes instead of a spinning reel but when it comes to drift fishing I'll stick to my superba or one of my other pins for the reasons stated above.