I actually prefer fossils non-fossil. I mean, they are cool and all, but since they always stick with that rock typing (which weakens most of them), most of them are not very astounding or capable. Just look at Aurorus for example, its typing was announced and everyone thought it was going to be awful (even though most said it was one of the best fossils designed and most said they would have liked to use it), and even while having 2 very good abilities (refrigerate: boosted hyper voice; and snow warning: blizzard that never fails) it didnt find much use. Another very annoying thing they keep doing with fossils is only giving them 1 ability and 1 hidden ability, the only exceptions being kabuto-line, omanyte-line, aerodactyl (what a surprise with those 3, huh?), tirtouga-line, and archen-line (which got only 1 ability, defeatist, and no hidden ability).
My point is, unless they re-work how they make the fossils, I will not expect much of them (I will like them, most of the time at least, but will not expect to see them much in battle...).