In this instance the rules ARE absolutely clear and unambiguous already. There are things you can log for experience, and things (P2 in SEP, Pax...) that you can't.
People who cannot interpret these things (actually they can; they're just trying to get something for nothing IMO) should not be pandered to by the regulator by defining things like "flight time" any further than they already have.
It's adding on words to specifically deal with these misinterpretations that will cause the problem by causing even more (inadvertent) obfuscation and potential for deliberate (or otherwise) misunderstanding.
On reflection, I retract and apologise for my final snarky comment of earlier; I'd been spending the last day or so digging down into the confusion that really does exist in EASA and National licensing and had generalised from that.
In other words, MJ - you are quite correct and I agree with you.