It's not clear from your summaries as what the invention(s) is/are, and how these would translate as patent claims. There is deep prior art around liposomal delivery and, given the breadth of Polybia literature, you may find your proposed invention(s) to be obvious. At the very least, you need to undertake a prior art and literature search before taking on the cost of an application.
Patent claims are not necessary in a PPA application. The schematic dictates only this particular PPA description. Claims are not necessary due to the nature of this application. The words clearly dictate the subject materials validity. The application describes what the object is, how it can be made by "a person of average intellectual nature in the subject sector. It is clearly novel. The schematic is not the actual application, it merely supplements it's nature. Clearly It follows USPTO guidelines. No figures headings where included as figure descriptions in the application. Prior art searches have proven no patent was or has been this particular application. No google patents as well as the USPTO database have, including all foreign intellectual property. And they have raised no partocular concern nor evidential proof.. A prior art search was was conducted. This particular application matter is a mixture of two natural products, however it has a new use between the two, such as "dynamite." Lastly, it states what it is, what it does or how it does what it does. Secondly, it describes how it is used. Mr. Yule, I have no education on this matter, however I can read a book. It is so simply obvious that with this methodology I need not hire a lawyer. The answer is yes, this is fully legal and follows all WIPO guidelines, I suggest you read up on patent law, Mr. Yule.