To the OP: with only 1.5 years to go I really see no logical reason to switch! You're almost there. If you hate the OR, consider doing a neuro IR fellowship. Definitely better hours and schedule than most other neurosurg specialties. If you also hate neuro IR and really just feel like doing neuro dx, then I'd still finish neurosurg and then try to find a radiology spot. Keep in mind that life is always greener. A bunch of neuroradiology fellows in my institution are having real trouble finding jobs. A lot are doing second fellowships and others I know of have finished fellowship without a job. For those lucky enough to find a job, pay is very low and location not ideal. It's a a total different story in neurosurg. There are great job opportunities for those coming out of residency.