We just returned from two full days at Epic Universe. We were able to catch Le Cirque Arcanus three times despite its early reputation for performances being delayed/cancelled (although admittedly one of our attempted showtimes was indeed delayed and then cancelled).
Le Cirque Arcanus has a sincere heart and some impressive visuals. I wish the world of the show would have more time to breathe but the relatively small theater requires a fair number of performances each day and therefore a somewhat short runtime (preshow and loading about ten minutes with the main show around 20 minutes).
All that said, I do love the mysterious circus vibe and I think it's the kind of show that theater kids (and theater kids at heart) will grow to love.