Here's my take on it;
1) They were too thoughtful. They fell in love with the idea of setting up, over the course of the series all the stuff we're used to. So, in one episode they install the phasers. But they're not accurate enough. So, in another episode, they sit around shooting the things at asteroids to calibrate the targeting. Then, in ANOTHER episode, they actually use the things to disable specific ship systems. This kind of pacing is GREAT for people who are committed to watching. But if you're just tuning in to see the odd ep, you're going to miss all this stuff and wonder where the action is.
2) They were too slavishly devoted to the canon. It's the most canon-aware series in the franchise's history. Most fans never noticed this, and actually complained about the opposite. They SHOULD have done a reboot. Maybe even with the original characters. They may yet.
Ah well, it had a lot of good moments. I liked it.