Some background first. I have been AA platinum for years with a couple EXP years when my travel was extra heavy or they offered double qualifying miles. I moved to Taipei a couple years ago and kept flying Oneworld/AA back to the States. I've been able to keep plat status this way. However, my travel also takes me to Singapore pretty frequently and China. For the former I use SG and the latter I use whatever is best from a schedule standpoint.

I think this year I will consider switching for two primary reasons. 1. I have to always take an extra connection on AA in HKG or NRT & 2. CX (my main Asia option in OW) doesn't seem to be a good partner in Oneworld in terms of earning and in some cases recognizing benefits.

I'll need to status match and that may make this moot, but still interested in hearing opinions. My options seem to be UA, EVA, or Singapore. All solve issue 1. EVA would be ideal, it goes everywhere I want. I've flown them before and the product seems ok, no idea on milage redemption, upgrades, etc. UA seems to be next best, very similar to AA and has a direct flight to Taipei. Singapore would be 3rd, but their redemption options seem best. I've signed up for the Chase Saphire card that allows me to transfer UA and Singapore miles, so perhaps this is moot.

I understand the UA status match process, it appears EVA does it but can be hit or miss, and Singapore doesn't offer it.

Any opinions on those three? I've filled out the form below for additional details about my preferences.

Questionnaire: Copy and paste into your post
Provide the requested information.

1. 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: Lounge, Priority checkin and boarding, upgrades, primeseat selection

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: 60,000-90,000

3. What fare class do you usually buy?
first, business, premium economy, economy
>>> Reply: economy

4. Are you able to choose your airlines and/or class of service? Do you travel for work and/or pleasure?
>>> Reply: both, I can book pretty much any major airline when doing business travel.

5. Which routes do you fly most often?
transatlantic, domestic USA, intra-Asia, etc.
>>> Reply: International between Taiwan and the US 4-5 times a year, Intra-Asia 5-10 times per year, 5 times a year between TPE and SIN.

6. What is your home airport?
>>> Reply: TPE

7. Do you have status in any FFP? What is it? How miles do you have banked in each FFP, if any?
>>> Reply: AA Plat, about 100k banked miles

8. What are your preferred airlines, if any?
>>> Reply: I like Singapore and Japan Airlines (lounge in NRT)