Really, what's wrong with Starfleet using high-powered lasers and then switching to phasers once the technology to make them portable came to be?
Or even with using both phasers and lasers, since they do different jobs in "The Cage" anyway?
The "wrong" would be in the fact that ENT showed us how Starfleet had phasers long before "The Cage" already. But then again, Earth's armies had gunpowder handguns long before they became standard weapons of war. In between, the crossbow was perfected, and briefly played a much greater role on the battlefield than the clumsy early handguns.
Similarly, the revolver briefly took the limelight from the rifle in the Wild West, when it proved to be a decisive cavalry weapon. The torpedo outshone the naval gun for a brief while, too. But fashions come and go in weapons technology, and lasers may have been a relatively brief fad.
...we should really include ALL mistakes, right?
I'd say so. After all, the "mistakes" in the early episodes as opposed to the later ones have already been discussed for decades, and we have derived much amusement from creatively reinterpreting them so as not to be mistakes any more.
The next movie will probably bring nothing new to that discussion: we have
already had to deal with the fact that Spock was more emotional in early TOS than in late TOS, or that the Engineering set kept growing and became more complex, or that people suddenly began speaking about Starfleet and the United Federation of Planets after half a dozen episodes where no such things were mentioned.
If there was anything left to be discussed about early TOS vs. late TOS at the conclusion of that show, or at the conclusion of the "future spinoffs", we slugged it out when ENT showed us how things "really" were before early TOS. STXI should be a breeze in comparison.
Timo Saloniemi