Hello, as far as I know there is no option to filter out debuffs through whitelist instead of blacklist using Debuff indicator. What this means is, if I want to use Debuff indicator I have to make sure that there are no "hidden" debuffs during an encounter/PvP, else my frame will get spammed with things like bleeds, slows etc and not really the stuff I'd like it to show.

All I want is to choose specific debuffs to show on frame and that is usually through a whitelist (which is possible with custom indicators, more on that later).

I also think that, this is more elegant solution, because what's really the point of this frame if Raid Debuffs and Dispels already exist, if not to offer more debuff customization outside of dispellable (while still using spell icons) or instanced debuffs?

The Big Debuffs option in Debuff indicator, kinda works as a whitelist, meaning I can add debuff to be specifically BIG, but I cannot use it exclusively for it. If a debuff is not blacklisted It will still show next to the Big Debuff. Also the option to "Only show debuffs dispellable by me" doesn't work on Big Debuffs.

Takeaway points:
An option to check if specifically Big Debuff in Debuffs is dispellable would be nice.
Custom indicators could also tackle this if they had "Only show debuffs dispellable by me" option as changing classes changes spells you can dispel.
Dispels indicator is really nice, but I like seeing debuff icons ¯_(ツ)_/¯

It was so hard to wrap my head around it at first, that I got debuffed irl. So please forgive any mistakes + repeated editing.

yea, thanks for the report.
there's a bug with "Only dispellable", the filter didn't take effect unless aura changes.
will be fixed in next version.
but the blacklist and the dispellable check do affect BigDebuffs.

as for the dispellable option in custom indicators, sorry, but there's no such plan, still lots of features with higher priority to be implemented.