.......would it be daft to just re locate the dr. side switch ?
Well that would depend on 3 points:
1st, Is how well you integrate the switch in the door (the choice of switch and your skill set will determine this result)
2nd, What you do with vacant location left by the old switch (your skiil set and imagination will dictate the result here)
3rd, How well you run the wiring, inparticular in the door gap, between the door post and the door ( yet again you skill set will determine the result)
Personally even though I possess the required skill set, I would't bother, as there are much more important design short commings to address.
IMHO the the benifit to effort ratio wouldn't make it worth the effort.
Having said all that, feel free to have a go and prove me wrong, your the one who'll be living with the results, not me