The premise of Discovery is very similar to that of Rogue One: i.e. a prequel tale involving new characters who have an (in)direct connection to the future Enterprise crew. Their mission is critical and will contribute in some special way to Klingon/Federation relations, and hence the backbone of TOS. Most of the DISC characters will likely die over the course of the series, explaining their absence from the 2260s-2290s Trekverse we've seen. Tech-wise, they've already made it quite clear the Spore Drive ain't gonna work without some significant ethics violation (harming / killing sentient living beings to use it). I'm enjoying the ride exactly the same as I enjoyed Rogue One.