I would say that if you can have an elec sect, do it.
I had severe SPD with my 1st child but was made to go natural as the hospital wouldnt give me a section, I ended up dislocating my coxxyx during the labour. I had SPD again during my 2nd pregnancy which turned into a spontaneous symphisiotomy (pelvis completely splits into 2) and was again refused a section (on my due date). I ended up twisting the 2 parts of my pelvis in opposite directions during the labour. I now have permanent damage to my pelvis, back and neck because of this.
I am now 16+3 pregnant again and my SPD started at 4 weeks this time. I have spoken to my consultant about getting a section this time because of all the damage that was caused with the last 2 labours and they are refusing again. I'v also been told that I wont be able to have an epidural because of the damage to my back.
If your hospital will give you a section and you are happy to have one then I would say do it. It would save you any damage that might be caused during the labour.