Just thought I'd say this to make people understand the update process more clearly:

This is a patch + expansion drop. The initial 2.5gb update you get is the 2.0 core system changes (a patch). Ones that everyone gets whether or not they own SB. (Think battle updates, Costa Del Sol swimming etc)

The second 3.5gb update is SB itself (expansion). This is only given to those that own SB. Similar to HW, no need to make people update things they can't use. It can be toggled on/off via the launcher config.