It is not necessary but if you can manage to solder it, it would help in an unlikely scenario that G gets detached from pico.That sounds like some really difficult micro soldering job. Is it really necessary? What size of resistor would one use for that, 0402?
If you want to do it, but you find that 2x2 mosfet is too small to solder to (which it is) you could go with a bigger mosfet (like aon7506, 7518) and use that.