The only content missing from the latest build are the potion events, in their current form there was no way to re-implement them due to lack of artwork that's fitting the new Hermione model and due to very buggy code with inconsistent dialogues. Besides that there has been multiple improvements, restructuring, new events being added. Nothing else was cut.1.38 runs fine for me. I just read that older versions had content that's yet to be put back in. I just wondered what it was.
Potions will make a return in the future, with new art, new dialogues and new potions to make.