I will stay with UA and see if I can maintain 1K. YTD I have 67 PQS and >$19K PQD which is enough in the new scheme. My 2018 PQD was $17k+, just short. But, that will depend on 2 TPAC Business Class tickets plus my usual mix of TATL and domestic Economy tickets.
I have value for 1K benefits, especially GPU/+P for TATL upgrade since company will only pay for Economy for all domestic and TATL travel. MM 1K companion benefits are also great for my daughter. Although awards are now much more difficult, I still hope to be able to use UA MP for premium class award travels, so 1K fee free changes are nice. 1K IRROP is also nice.
I used to fly USAir exclusively for over 15 years and switched to UA because of better MM benefits.