Will you change to or favour another airline loyalty program?
No, unfortunately being based in YYZ, I'm tied to *A. I refuse to support AC in any way possible; just because of the consistently bad service I get from them and their business practices.
I'll have to see how my flight patterns in 2020 work out, and based on this I might be a free agent and not bother with FFPs at all -- just fly premium cabins instead for long-haul.
What program(s) do you find to be better going forward?
I wouldn't be surprised if the airline industry starts to lean towards what UA has announced. So I don't think there will be one 'better' for me going forward. I'll choose to be a free agent and that'll probably save me all the trouble of navigating through all the program requirements.