I just noticed this:
Technically size modifiers only apply to ranged combat not melee. The size description says "Size is an important factor when shooting ranged weapons" (page 249), and also the to-hit penalty/bonus chart specifically mentions the +10 bonus as "shooting a Hulking target" (page 247).
Also the modifier to-hit a horde specifically says to treat it like an individual and also only refers to it as a size modifier (which should mean RAW the size modifier only applies to ranged combat also for hordes) (page 359).
So did others notice this?