It is always best practice to start a new game from scratch after a big patch so most likely yes, I hope Lae'zel will show up because Yenna is only there as a place holder when all the other targets of her are unavailable and seeing as you can only be max 4 in party, there is hoping that Lae'zel is simply just bugged out but technically maybe still considered to be part of your camp, please let us know how it goes as I am very interested to hear of the results, I suspect that you may simply have found a crazy bug that makes Lae'zel turn unresponsive to player agency somewhere along the way because...
...you still would have had a dialogue had she simply ran away due to lack of regards to her sidequest from late stage of Act 1.
I don't mind waiting till you get around to it for not wanting to disrupt some possible side quests.
