Hey, yeah I agree! I feel like there has been a drought, a cooling-off period, a distant move.. etc etc. But now they seem to be back on it on screen (on screen, we don't know their relationship off screen, they could be an old married couple for all we know hah).
Small things like him nudging her subtly to move forward, like the recent ep with the airport as the opening (I can't remember which ep!), or him invading her personal space to get the clue in ep 519 (the prison ep).. I feel like something is definitely brewing.
Let's stay patient!