I think the main potential issue with FFP may be whether the particular reticle on that scope is bold enough at 1.5 but not covering so much area at 8x as to be a hindrance, but that is going to require actually having a look through that specific scope (which I haven't).
FWIW though, I have a 1.5-6x FFP scope, a Nickel, on a drilling, with a German Nr 4 reticle. At 1.5x there'd be nothing faster IMHO, while at 6x there's no problem reaching out to longer ranges, without the reticle being an issue at either end. A mate of mine has a couple of Swarovski 1-8 scopes with illuminated reticles and he seems pretty happy with them too.
Having said that, the only real "dangerous game" rifle I have, a 9.3x74R double, has a 4x, which suits it well.
