Downloaded the new Mac build and still had AE crash. Took a little while longer this time but heres an updated crash report! Thanks for all the help youre the man!
Getting close! Just updated the upload with some more fixes. Seems adding parallelism in some places caused more problems than benefits(and cache-abuse for that matter). I also added some progress-bar feedback that should show on the bottom right of the composition window. Lemme know how it goes and I'm so sorry for the problems you've had to face.. If it still refuses to be stable I'm also totally open to refunding you.