R151NG5UN said:
(i) Even though I am from a visa exempt country, I know that it is the border controls perogative to refuse me entry on the grounds that I could/ might outstay my TRV if my COPR has not been finalised or any problems arise and with cutting my ties I guess that would certainly be a valid concern of a border official.
If refused, you can also ask them to issue a TRP under "early admission" (See OP 20 "Temporary Resident Permits") as it is exactly for the case where the PR is in process. Assuming there are NO indications that you shouldn't be allowed in, the manual says it is appropriate to grant a TRP. I wouldn't ask for a TRP up front, and the chance of success is at best mixed, but it is at least another option to explore. The downside is that TRPs take a long time to process.
R151NG5UN said:
(ii) Being without healthcare for the duration that I am on a TRV and a further 3 months if COPR is issued to myself.
Buy a travel insurance policy. Also, the rules about eligibility depend upon the province. Here in BC they are quite generous and make spouses in the PR process eligible for MSP even while the process is ongoing.
Good luck!