Another post on another board brought up an excellent point about the show Batman: The Brave and the Bold. It's all about bringing back Silver Age characters that only continuity buffs would know. However, one reason why the show works so well (and is so fun) is because the story is about the characters and not the reverence of the past. Stick to the characters and why they were designed the way they were, and you don't have to worry about reverence of the past, because that will come automatically.
To quote one Agent Helix: "Right, it's not important that Kamandi is a silver age throwback to the show. What's important is that he's a the last human boy in a post-apocalyptic future of evil talking animals. And that's awesome."
To me, that line of reasoning also falls onto Trek. It's almost analogous. "It's not important that old-Spock is there to connect the previous Trek to Abrams. Rather, it's important that old-Spock is there to guide our heroes and help face down a rather ballsy villain." Honor the characters and canon comes automatically. Even Trek's fabled technology is secondary to that.
Frankly, we could even look at TNG/DS9. I would argue that they didn't feel the need to stick to canon, only on a few occasions (They rarely felt the need to reference TOS, or each other for that matter). Beyond the legacy, they told their own stories in their own ways by and tended to make a more expanded and exciting canon universe, thereby adding to the legacy.
I also think too much adherence and dependence on the franchise was one of the reasons why Enterprise was killed. The 4th season found a near perfect balance of being a prequel and adhering to the past mixed in with decent storytelling. But the first two seasons always felt like whatever nuggets the writers threw to the fans was followed by a "wink," as if there was a joke or a nod, while at the same time the writers took their eyes off the road in order to nod. When you're too concerned about canon and prioritize retcons and continuity links over plot development, then you're trading quality and relevance and creativity for fanboy appeasement. That in itself is disrespectful to the franchise.