You can relocate to back home but if you want to stay in Canada, you should. This is a new rule and we have absolutely no idea how these cases will be handled in the future because it hasn't happened yet.
Surely, they do not have the manpower to chase up each and every sponsored spouse after their 2 yrs. of PR so I am about 99% sure that they will only examine you like they examine people for residency requirements and that is mainly when you renew your PR card or possibly if you apply for citizenship.
You can stay in Canada and work or do what you want until then and when the time comes they may want to do something about it, we will see what happens. Sometimes marriages break down on their own without anyone being at fault. It is possible that they don't go after you and it is possible that they will but you might win an appeal, especially if you are living in and are well established in Canada.
I am sure there will be many appeals in 2 years when they start revoking peoples PR's. Of course there is also the possibility that during the next 2 years, you will be in a new relationship or that you will be in a job where the employer will want to sponsor you if you lose your PR. Nobody can tell the future.
As for the 3 years that the sponsor is financially responsible for their sponsored spouse, I see no mention of anything in the new rules lifting that. It has in the past been very difficult for sponsors to get out of this responsibility, even when they have clearly been victims of marriage fraud and I don't see that with the new law it will be any different.
Edit: I see that the link also provides the definition of neglect, being that your sponsor refused to provide you with food, shelter and clothing. If your wife was the one who wanted the divorce, I think you could also make a point that she refused to provide those things to you