I'll probably have 3-4 round trips between China and the US in the next year, so I'm thinking about getting an airline elite status.
Currently considering Qatar Airways, going through Accor's fast-track to Gold (oneworld Sapphire).
Kenya Airways SkyTeam Elite Plus, through a hotel status match ($299).
Alaska Airlines MVP Gold (8 short-haul LAX-SFO runs).
Qatar Gold: the upside is lounge access even on US domestic flights, especially the Cathay Pacific The Pier, but it seems there's no premium economy on AA and Alaska?
Alaska Airlines' advantage is that both AA and its own flights have premium economy, which seems like it could offset the cost of mileage runs.
As for Kenya Airways, EP itself is nothing special, but SkyTeam has more China-US routes.
So I'm asking for advice on how to choose.
Based in the Midwest, usually departing from LA or Seattle.

These options actually serve completely different use cases. Qatar Gold getting you into lounges on domestic U.S. flights is genuinely nice, but if you're mostly flying AA and Alaska, the lack of premium economy access really hurts—it basically means you're spreading the cost of mileage runs onto lounge access. Alaska Gold looks like it pays for itself, but you first need to figure out how many times a year you'll actually fly AA and Alaska. If it's just LAX-SEA round trips, then what happens after you hit the status? That question might be worth sorting out before you even decide which program to pick.