Should i ditch BA for CX or stick with what i already have?

(1) What is your home airport?
Currently LHR - but moving to HKG in a month for 1-2 years.
(2) How many miles do you usually fly each year & in what class?
25-50k.
(3) What types of fares do you usually buy ?
If it's a narrow body usually economy, if its wide body either premium economy or business. Ill fly narrow body business if its a good price.
(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?
Mostly leisure travel so i can choose.
(5) Which routes do you fly most often
I'll do at least one HKG to LHR/MAN each year in business. I'll also take a few long weekends around Asia over the course of the year. I may do other flights but don't know for certain yet.
(6) Do you have FFP status of any kind of OW or other airline at present? What is it?
I have BA Exec Club blue with approx 40k miles and an Amex 241 voucher.
(7) What is most important to you in a FFP?
Lounge access and free advance seat selection.
(8) Preferred Airlines
Reply: Any OW carrier