I've gone through periods of a day or two when my usual juice stops having TH and the flavor isn't as strong.  And then suddenly, TH and flavor are back.  Pretty weird, I don't know what to make of it.  I'm just glad it gets better.  Perhaps if you give it a little time it will get better.  If not, you may want to consider vaping at 5V.  I don't know what PV you're using now but it may be time to step it up a notch.  
I used a 510 for about a month and the batts really started getting to me.  I got a Tornado and not only does the battery last 2 days but the flavor and TH were significantly improved.  If you're a 510 user, I would highly recommend an Ego or Tornado battery.  And for the best possible TH, dripping is a MUST!