I am currently Premier 1K with United MileagePlus. I think this is a solid choice, but given we recently rolled into the new year, I'd love some other opinions on whether I should stick with MileagePlus, or switch to another Star Alliance program.

For background, I was previously loyal to Aeroplan, but eventually switched to MileagePlus for two reasons:
1: (main reason) ridiculous (fuel surcharge) fees on award redemptions using Aeroplan (on certain airlines, including Air Canada)
2: (related reason) comparatively low fees when booking the exact same flights using MileagePlus award redemptions (I already had a MileagePlus account from when I previously lived in the US)

I cannot see myself switching back to Aeroplan, so really just wondering if there's a better program within Star Alliance than United MileagePlus for my situation. Details as follows:

(1) What is your home airport? YYZ (Toronto)
(2) What types of fares do you usually buy ? C for business travel (~80%), cheapest Y for pleasure travel (~20%)
(3) How many miles do you usually fly each year? ~75K (excluding class /status bonuses)
(4) Do you have any kind of status at present? What is it? UA MileagePlus Premier 1K
(5) What is most important to you in a FFP? In order of importance: best mileage earning rates, good award redemption rates, upgrades on travel, free lounge access
(6) Which routes do you fly most often? Long-haul international for business, Toronto-SE Asia for personal
(7) Preferred Airlines: Air Canada, Lufthansa, Swiss, Singapore, ANA, United (mostly only due to current status/upgrades)
(8) Do you travel for work or pleasure? 80%/20% work/pleasure. I can choose any airline when traveling for work, within reason.

PS. I already have accumulated 24K PQM with MileagePlus this year, so that should probably influence the decision. That said, I can always use this advice for next year.

Thanks in advance!