You get more illumination falloff with a shorter lens. Often this can be accommodated by using more edge and corner burning, or by grinding a
custom diffuser to be fit in the head. I rarely use a 150 lens for 4x5 work - nearly always something longer, like a 180 or even 240. I sold my
135 Rodagon, which was a good lens, but not in the same league as my other lenses. I don't see any sense using a short focal length unless
your simply don't have enough headroom to raise the negative stage sufficiently high. There is no optical advantage, and really, a distinct
disadvantage. I apply the same philosophy to all my other formats, whether 8X10 or MF or even 35mm. The notable exception is when I deliberately want to introduce a bit of excessive illumination falloff into the print.