Lissandras new lore is amazing.
Riot has transformed lissandra from a malzahar clone ( a doomsayer that tries to end the world) to a flawed being that has seen it all ( no pun intended). so what follows is my interpretation of the story.. afterwards i will make a final verdict :
**My interpretation :**At the very beggining lissandra and her sisters were immature and careless ..they beleived that power can be obtained without a price and they learned their lesson. Each one losing one of their senses in the process ! Lissandra specificaly was blinded and subsequently got distant from reality and the material world..she chose tho walk in dreams and naturaly encountered nightmares that due to her ''blindness'' couldnt recognize as such..now in the middle of her life at the pinacle of her power lissandra understood that there are powers she could never hope to conquer and her existance was like a candle in the wind , fragile and temporary..Tormented by nihilistic visions of her demise see sought eternity no matter the cost , and the quicker way to grasp eternity was through oblivion..Then she made the pact with the nightmares from beyond promising to be their herald ,and thus sacrificing all creation in the altar of false dreams , freezing her humanity in the process.Clothed in ice the ice witch relished a period of fullfilment until her sisters shattered the glacier prison that had traped her sight along with time ....their ideals sook lissandra and in a moment of epiphany she realized that what mattered the most to her was family and not eternal life ..and then her vision was restored and desperately tried to make the watchers change their plans ( or so she hoped) ..''yes more time'' she surely thought ''i can persuade them to stay silent ..and then , and then we will be together for ever '' but little did she knew the monsters have no feelings and she alligned herslef with them.And then they attacked , and lissandra had to pay yet again for her blindness and this time the price was literaly her world...Her sisters and her allies all in order to stop those she chose to unleash..and lissandra paid and continiues to pay with her very soul as the intrusive visions fo watchers remind her of her double betrayal and the price for eternal life ''wisdom'' , because those that know must protect the ones that dont and carry the responsibilty of their old immature actions forever...Now lissandra is trying to erase history , to erase knowledge in order atone for her sins but no matter how many centuries will pass lissandras love for her sisters remains making her unable erase them from history because that will mean that noone will remember them not even lissandra herself..Now empty and broken she just does what has to be done...becoming a monster inorder to save humanity for even greater monsters or perhaps lissandra is still selfish and unable to understand the value of mortality ...one thing is for certain the ice witch will not pay anymore !
Final Verdict : Lissandra's unique themes were preserved ( the willing alliance with the void , the iceborn thing and the erasure of history) while others like the doomsayer and the deceiver of generations were discarded in order to make the character mroe complex and unique. You see lissandra wasnt deleted the aspects that made lissandra malzahar #2 and lebalnc #2 were deleted , now her character makes sense , her story is honestly one of my favorite lore pieces ever the moment i read that each sister lost a different sense i knew this was going to be a great story ! All in all be positive and try to appreciate the new lore for what it is ..and if you think that elements of the old lore werent preserved then i think you have the same problem lissandra had 