Revan/CLS/Nest Taunt ignore, and Marked mechanics

Do you see what I mean though? That the character shouldn't be unable to gain the taunt "buff" while he has a locked buff immunity. What I'm saying is that marked should force all units to target the marked character, and "taunt" ignore shouldn't be able to get around "marked". Maybe in the future they could make an ability where a character can ignore "marked" instead of "taunt". But the main point is that marked, and taunt can have the same function but one is a debuff, while the other is a buff.