Hi Andrew,
I have an Alvey loaded with 6lb fireline that I use in estuaries and don't have any problem with tangles or any major problem with cutting of fingers. I always come home with some cuts whether it be mono or braid but I only use my finger as a light guide and don't leave it on there flat out. As for tangles I get hardly any using braid whereas I used to get quite a few more on mono. I haven't used it on an Alvey surf outfit though.
Cheers Luke