This was one of the procedures that was discussed as a possible fix for the Hugo Awards; I wasn't convinced that they would improve that process, but the BSFA Awards are a somewhat different case (smaller electorate; fewer categories; tighter deadlines) and I'm reserving judgement until we see the outputs this year. In particular, I'll be looking to see the impact of this new arrangement on Best Non-Fiction, a category where I have occasionally felt grumpy about past years' BSFA shortlists.
Along with the usual roundups of the sf of 2015, Nina Allan (here and here), Ian Sales and rather briefly Jo Lindsay Walton have posted their thoughts on the BSFA process specifically. As far as I remember (I don't seem to have kept a record) I myself have put in nominations so far for Letters to Tiptree, The Story of Kullervo, Luna: New Moon, The Shepherd's Crown, Penric's Demon and "The Three Resurrections of Jessica Churchill", which is two of my four allowed nominations in each of those categories. (I won't nominate in the art category as I don't entirely trust my own taste and am content to see what other people nominate.) I expect to fill the other slots before Thursday's deadline.
What about you?