Yeah I've lived in Canada for 7 years now, we have been together for 2.5 and have lived together for 1.5. We recently went to NZ for 8 months and are considered common law there (she travelled on a partner work visa). I think our case for a genuine relationship is very strong, it's just the next 8 months of travel that may cause an issue.No direct communication. The only issue would be proof that you and your common law will be returning to Canada and plan on relocating there permanently. Given the breakdown of your travel plans it looks like you will be back in Canada and living in Canada full-time before your application is finished processing. There tends to be more interviews when there isn’t a significant relationship history especially in person relationship history or there is perceived benefit from immigration to Canada. If you are a Kiwi and are common law there is a extremely small chance of needing an interview.
I'm very impressed with all the advice so quick in this thread - it sounds like it would be safest to apply outland and hope it is approved before my PGWP expires (I'm assuming I won't have implied status when that expires)