Nth-Ing compass. By contract the base has to be open until at least June 2017 but expansion and growth in SEA is one of delta's main goals. The e190s are a variable but it's likely they'll maintain the SEA base, we're not that large (50 ca/fo) and a lot of our flying is built out of other bases like LA anyway, they can easily just stop doing that if we lose a few routes to the 190. And with load factors being what they are they'll probably take over the busier stuff with the 190s and have us open up new routes again with the 175s.
You'll hold sea out of training most likely, it's slightly more senior than lax but not by a terrible amount. If it were to eventually close, there's a sea-lax flight about every 30 min and we have commuter hotels and plenty of own metal on the route you can reserve the jump on, plus 2 extra dl jumpseats, sooooo. And you'll have benefitted at that point from the fast movement at CPZ.