Some debuff are not cleanseable, but it is not comunicated enough. I suggest the uncleanseable debuff colored differently then normal debuff, maybe black/orange? Or it could have a different shape, or be in a different line then normal debuff.
#Color uncleanseable debuff differently
pulsar herald
distant charm
We're gonna have to wait and see what they're going to do with the Buff UI revamp that's planned for this July update in KR (Aug in NA/INT). But I hope your suggestion is included too.
ashen canyon
I also hope they can give buff from pot(Fighter/Apple/Elixir) separating from normal buff for easier manual control 'w'