Not sure if this is at all possible but as the title says, can we show tick indicators without an active buff or debuff?
I've only looked at 12 specs so far but there might be more where it would be useful.

Currently it's only Frost DK where I came across it:
http://bfa.wowhead.com/spell=253593/inexorable-assault

I've got it tracking currently but as soon as you're out of charges you lose the indicator of when you'll get the next one, we could just not track it but I think it should be as knowing if the next charge will come before the end of Pillar of Frost ends sounds like something we should help people do.