If there really is any conflict, perhaps it's within RISCOS Ltd. My guess is that Aaron indeed feels (professionally) threatened by the possible appearance of a freely downloadable RISC OS 5 softload for use with RPCemu. To specifically prevent this, he tries to find some legal leverage. Which, of course, ends up encouraging all activities ROOL is engaged in, except in allowing a RISC OS 5 softload to be released for RiscPC computers and emulators. As far as any supposed details go, it seems only Aaron is pointing fingers. Obviously Aaron could exert a certain amount of pressure on ROL, since the licenses VirtualAcorn sells are a main source of income for ROL.
Personally, I think ROL has been close to running on empty for some time now, because RISC OS itself simply isn't commercially viable anymore. Any future for the OS is in the direction ROOL is going. I have no technical knowledge on the exact differences between RO4/6 and RO5, so RISC OS 6 may well have the edge, but it has no future if it continues to live off a dwindling base of subscribers who get no assurances as to what and when they get anything for their annual fees. That said, I find the most recent release of RISC OS 6.14 / Select 5i1 to be pretty good, but these are rare.