Re T1 Pier B
I don't know if the thinking has changed but what I understand was being considered when the Terminal building is eventually demolished was to use the west side of B pier for T2 flights and the east side for T3 flights. However, if that suggestion is put into practice, I've no idea how long the pier would continue to be used in that way and whether an upgrade or rebuild is likely in the meantime.
Re Pier C, isn't that being retained,at least partially, and what was to be pier 4 on T2 not happening?
Scottie Dog or roverman is more knowledgeable on this than I am, so I stand to be corrected.