Hi! I'm so glad to hear you liked it.
As for your question, you will be able to restrict and undo certain transformations. For example, there are chest sizes up to 3XL in the files for the latest Patreon version, but you will have to request them. Some other transformations, like eyes, can be undone at some point.
The note just means they don't have a separate event to go with them! Like for the chest transformation you have a little event where Ethan has to choose to bind or not. The rest I don't consider significant enough to devote time and effort to making a event where Ethan has to figure something out about it. It's my way of saying "this transformation is small enough that Ethan can brush it off."
Many hair styles will be incorporated, and you will be able to go back to medium and even short hair later on in the game! Hair dye is being considered too, although it would only be visible on the paperdoll, not the CGs. (The cost would be insane)
Thank you for playing and I hope this answers everything.