The 50% bonus (for plain, vanilla MVP) on AA and DL is 25% better than bottom tier AAdvantage and SkyMiles members earn.

What's more, you get 100% accrual on most KE fares. Unfortunately, KE flights don't count towards status.

I guess things are pretty bleak on the tpac front right now (i.e. I'm reflecting upon the fact that the best advice I could give you was to suggest a plan that forces you to go out of your way to fly DL/NW just to rake in ~50k miles per year that you can actually use at sane redemption rates).

On the other hand, being locked into UA is no picnic either, most (if not all) Asia based FFPs have nasty expiration policies that prevent people like yourself from booking decent rewards. Furthermore, tmk bottom tier Asia Miles isn't exactly awash with benefits that would compensate for the lack of realistic redemption opportunities.