From the C side, the T1-2 airside connector to D is easy to find next to the exit to baggage claim. In fact the airside connector has a really nice sofa seating area (good for naps in a long delay) and a slightly secret but public yoga room. And great views of the ramp.

With DL Check-in counters near the T2 Starbucks, it seems like it’ll make for a nice walk from the BART station (unlike currently having to walk around 3/4 of the airport)

I’ll miss being able to use the C security checkpoint for now though, I’ve been lucky enough to never wait long in the pre check line there, which always seemed like a nice convenience.