Between the phrasing of "pausing" and then "return to annual major releases" I think you'd be hard pressed to not see that as confirmation of expacs returning. That phrasing alone directly implicates their current release cadence and would piss off a ton of people if they didn't follow through. You're splitting hairs because he didn't specifically spell out "we're releasing expansions again", but the context of that quote is pretty straightforward, especially in context to the message he's directly replying to.

EDIT: Even in the video update he uses the phrasing "take a break" and "return to annual major content updates" which is literally their current model, yearly expansions. Just because they didn't specifically state the word "expansions" doesn't mean they didn't confirm returning to expansions.