I seem to recall that at some point, on some thread on TrekBBS, somebody speculated that the phase pistols and cannons of ENT were first-generation nadion technology, and that nadion-based and laser-based weapons "leapfrogged" each other for a time, before nadion technology won out, with The Cage happening during a period during which lasers were dominant.
I don't care for that explanation. The reason Roddenberry abandoned "laser" for "phaser" was because he realized it had been a mistake to use it in the first place, that actual lasers didn't work anything like what was shown, so it was a misnomer. If he himself had made more stories in the "Cage" era or before, I have no doubt that he would've changed "laser" to "phaser." Just like other things such as dilithium and the Federation have been retconned to exist earlier than they were introduced on the show. The word "laser" was only used two times in "The Cage" anyway, so it's easy enough to disregard.
Referring to something else I mentioned in passing, in my previous post: I think we all know the real-world explanation for the TOS-era female-only "skant" (yes, I know it's a TNG term) uniform from TOS is that the powers that be decided the women should wear miniskirts, but (at the risk of a small breach of the "story idea" taboo) has anybody published an in-universe explanation for it?
I think it was Grace Lee Whitney who wanted the miniskirt uniform. We see it as sexist today, but women at the time saw it as a liberating fashion statement.
And I believe the techical term for that dress design was mini-culottes -- basically a briefs cut with flaps to suggest a skirt.