In his sermon "Free will - a slave" Spurgeon basically pins down free will belief as a rebellious idea. Being a Calvinist believing in (T)otal Depravity, he sees man as unable to come to Christ due to his evil nature. The will would certainly not help, he says; "The will is well known by all to be directed by the understanding, to be moved by motives, to be guided by other parts of the soul, and to be a secondary thing. Philosophy and religion both discard at once the very thought of free-will;". Or as I say the will is motivated by (too) many things.
Although I don’t believe man is totally depraved, I see free will as a wishful idea that is a double edged sword concerning the way we see ourselves and others; we may feel high and mighty about our free will power if we have success and then if we don’t, the blame is all on us down to our "free will".
Not all believers rejecting free will believe in immortal soulism. A. E. Knoch and the Concordant group associated with him taught (teaches - the group is still there, he is of course long gone) mortal soulism and universal salvation.