Giving Romulans cloaks 100 years before Balance of Terror is more egregious a "canon violation" than anything done in the modern era. Now it's just accepted.i was on this BBS when ENT came out, and the forum wars of ENT's catastrophic offences against holy canon were the stuff of legend.
I was younger then, and i did have issues with ENT and its relationship to canon, but as you get older, you just roll with it. It's just a TV show.
I remember being upset to the changes to the Klingons once. In 1979. Just rolled with the multiple and various changes to the species since then. Didn't always like the changes, but I just rolled with them.