(apologies in advance if this is asked and answered. Spent a while searching first and nearly all discussion on yq/Yr is US focused..)

Brief version is:
I'm BA gold. Travel biz to us and (once open) China approx monthly. Obviously not done this for a bit, but looks like we are opening our travel policy up. Rather than automatically sticking to BA thinking of looking at options as I am fed up of reward flights costing a fortune (family of 4) due to YQ. from what I can see one world, delta/virgin are just as bad. But star alliance maybe better?
Anyone have experience / advice here?

• . What is most important to you in a frequent flyer program (FFP)?
  upgrades, priority services, baggage allowance, good award redemption rates, better award access, lounge access, etc.
  >>> Reply: low YQ/YR! + reward availability during UK school holidays (esp oct half term/Easter to get sun, eg Caribbean, far east)
  
  2. How many miles do you usually fly each year? How many flights/sectors?
  less than 25000 miles, 50000+ miles and 20-25 flights, etc.
  >>> Reply: 50k+
  
  3. What fare class do you usually buy?
  first, business, premium economy, economy
  >>> Reply: business
  
  4. Are you able to choose your airlines and/or class of service? Do you travel for work and/or pleasure?
  >>> Reply: yes, can choose
  
  5. Which routes do you fly most often?
  transatlantic, domestic USA, intra-Asia, etc.
  >>> Reply: lhr-NYC. Lhr-sin and lhr-pek
  
  6. What is your home airport?
  >>> Reply: LON (LHR mostly)
  
  7. Do you have status in any FFP? What is it? How miles do you have banked in each FFP, if any?
  >>> Reply: BAEC gold. About 100k avios
  
  8. What are your preferred airlines, if any?
  >>> Reply: fairly OK with any