In defense of the CF: If there is only 94 kms of asphalt on an 800 km walk, as stated earlier, I would call it insignificant. Some of it is between Hontanas and Castrojeriz (ca. 7-8% of the total distance), which doesn't bother me at all: A beautiful day's walk.
Most of the CF is, IMHO, peaceful walking on natural paths, off traffic and asphalt. Walking out of Leon can be an ordeal, but after an hour's walk, there is an alternative, peaceful and pleasant route, through Villar de Mazarife. Same with the entrance to Burgos: The river route is great, while the alternative route is suburban asphalt and a disaster. Choose wisely.
The CP (at least from Porto) is much worse, with all the painful cobblestone walking, IMHO (again).
If you really MISS traffic, asphalt and dangerous highway shoulder walking, drunk truck drivers (yes, they where resting in petrol stations drinking beer before continuing), without much pilgrim support, try starting in Lisbon: A trail for people with a serious , active, death wish... (Again: Just MHO). I endured it for 5 days before taking a train to Porto.: Never again from Lisbon: It is not ready for pilgrims.
Edit: I have walked many different Caminos over the last 15 years: VdlP (great), Mozarabe (not so great), CP, San Olav (Burgos-Covarubbias; 64 very nice kms), parts of the Levante (starting in Alicante, desolate, lonely).
The CF is my favorite, for many reasons: Easy walking, mostly, lots to see, meeting many nice people (if I want), some/many stretches very peaceful (like the Meseta), good/fantastic infrastructure, and so on. It remains my favorite Camino. I will do it again, if my deteriorating health allows me.
Well, we shall all die someday, if only we can stay alive and keep a good health...