The FOV fix is great, just added support for it. It is explained in the FOV notes in the game info. Basically if you use it, change the FOV to 112 in the calculator (it will reset every time you change aim, fixing this is on the todo list). The correct FOV is probably 80 vdeg, but I'll leave it as it is until there is a FOV option in the game.
Mouse smoothing also makes the the aim feel a lot better, but the sensitivity is the same so no change needed.