You need to edit the filtering if you dont want your own debuffs but players, look into his aurafiltering.. probably there you have to edit.
Don't have time to dig into his code , but had a quick glance.. not tested but i think it should work.
Try setting ignoreDebuff = true, -- hide others' debuff on enemy and edit
elseif not UnitIsFriend("player", unit) and (not cfg.AuraFilter.ignoreDebuff or not icon.isDebuff) then
not sure if you can make the raidframes spawn like that.
elseif icon.isPlayer and (not cfg.AuraFilter.ignoreDebuff or not icon.isDebuff) then
Play around with raidanchors..
I used Transparent frames quite a while ago, i found a 2 year old screeni here how i displayed DBM then.. sorry about the poor quality though.
Imo, just pick clean bright colors!
I only show my skada as text, i did the same with transparent frames and sticking to it.. personal preference i guess... top left corner.
Hope that's of any help.. good luck!