As sad as it is, I do feel they made the right decision to split when they did (even though that wasn't the outcome either had wished for with their relationship. I honestly believe they both sought that happily-ever-after together dream of marriage and a family) as neither were completly happy, nor were they making their partner happy. This led them to become insecure in their own relationship
I think despite all their problems they both believed they would work it all out after having some time and space apart with John in Australia and both wanted that initially.
It is not my opinion that they should get back together (at least not any time soon - they haven't even had time to mend yet) as they were only hurting and upsetting each other. The love WAS evident throughout the series and so it must have been frustrating for them that it wasn't enough to fix, solve and overcome all their problems. Surely we all want them to be happy?
If they were to get back together soon, then these habits and old patterns would resurface after a short time as
NOTHING has been resolved. If a little longer down the road John and Josie felt they are the ones that
CAN make each other happy and their issues have been addressed then I will support them 100%. Maybe after time .. but not NOW or in the near future. (And hopefully if they do it will be for themselves and not because they feel pressured to do so for the sakes of all their supporters who have been rooting for them all this time. It's not about any of US. It's about THEM)
Of course I would like more than anything to see them be friends someday - especially as they went through so much together. In my heart I know that they can be in the not too distant future (it's a question of whether they want to be) I HOPE HOPE HOPE they can restore their friendship, I really do. If they can come through all this crap and harboured bitterness, anger and heartbreak then I am confident that they can be the truest and best of friends again
My wish is for them to look back on their happy memories with fondness (of which there were MANY!!)

I can't picture anyone else having the ability to make them as happier as they made each other during their happiest times - but I want happiness, peace and love for them both above all else.