I'm not sure if there's really 3rd wave hate of Leia specifically, but there's been a lot of chatter recently about Disney pulling Slave Leia everything, cause it's Slave Leia.  Because the best way to show that we no longer condone an activity such as slavery is to whitewash any example of it happening from a 28 year old film franchise.  And we all know that Disney is the epitome of political correctness and social justice <commence Liz Lemon quality eye roll>