I'm a long time UA/*A member (>300K lifetime miles), currently UA gold but will be Platinum by the end of the year. I'm not finding the program that valuable anymore and am trying to decide if I should move to another carrier. Any help/advice would be appreciated!

(1) What is your home airport? (SFO, SCL, London LHR, HKG, Singapore SIN etc.)
IAD for now, will change to DEN or AUS

(2) How many miles do you usually fly each year & in what class? (<25K, 25k-50k, >50k)
>50k

(3) What types of fares do you usually buy ? (First, Business, Economy etc.)
Economy

(4) Can you choose your airlines and/or, class of service?. Do you travel for work and/or pleasure?
Work and pleasure, mostly work. I can choose the airline, but I work for NGO and have spending restrictions.

(5) Which routes do you fly most often (US Domestic, Transpacific, Kangaroo, in Asia etc)
Transatlantic, North Africa/Middle East (I spend a lot of time connecting in FRA)

(6) Do you have FFP status of any kind of OW or other airline at present? What is it? (AA Executive Platinum, QF Gold, UA 1K, LAN Comodoro, etc)
UA Gold (will be platinum in next month or so), EK Gold (as Plat member companion), SPG Platinum

(7) What is most important to you in a FFP? (upgrades on travel, priority services when flying the airline, extra baggage allowance, good award redemption rates, better award access, free - discounted lounge access, etc.)
UPGRADES, lounge access

(8) Preferred Airlines
Up in the air...UA right now, maybe QA or EK? Or is AA better with base in the US?