I can tell you about RFEs, I know this as a fact as I was told so by folks who would know. Literally all major vendors, yes, they look at RFEs, but if there are only handful of customers asking for a new feature, trust me, it will never happen. There has to be certain % of customers requesting it for them to even be considered. Its like that with CP, Fortinet, Cisco, Palo Alto. They will look at every RFE that comes in, but that sadly does not guarantee you much : - )
You can try TAC, does not hurt.
Best,
Andy