Not really - the idea is that it is standardised - you push in a temperature and everyone knows what’s coming out the other side. It totally stops being useful if you can bend its output to your will. However if there are missing schemes then yes, propose away, in detail, on GitHub.
You can replicate the exact same functionality with a standard hand-rolled payload formatter.
That said, PF are for whims 
- real programmers decode on their own platform - for two very very good reasons:
- One source of truth entirely in your control
- PF are not 100% guaranteed to run - if the server is under pressure and it times-out, no decoding.