Hmm.. This patch doesn't seem as big compared to 8.1.5 ...then again a lot of their man power must going into making sure Classic must have a solid release (unless there's a whole separate team that's working on Classic)
With 8.3 coming after BlizzCon, they might discuss 9.0 major features (party-sync in 8.2.5 is a massive baby step). I don't think they will announce the expansion, they would spoil the end of BfA before anyone has the chance play through it on 8.3, announcing it in spring makes more sense.
8.3 will very likely be available after BlizzCon, that means the expansion gets announced at BlizzCon and they maybe already start the pre-order, so it makes sense the 120 boost is in 8.2.5 given that buying a new expansion since WOD always comes with a boost.
That feel when people will still post the work around for freehold leveling and it'll be cheaper than a 120 boost :(
Timewalking is the best way to level 110-120. No reason to level any other way (unless it's your first time).The zones are fun the first time, then that's about it. Leveling is so painful outside of Timewalking....