Yes, agree there. I read the novel before seeing the show and I found it helpful. One example is when Raffi visits her son. Having read the novel I knew some of the back story behind what happened between her and her family. Also, when Picard first visits her on the show I already knew she was not going to be too happy to see him. And there are other examples, Agnes' background, and Picard's post-Nemesis as well.
Now, of course, we must all be cautioned that the novels are not canon. The show runners can changes something that nullifies some part of that 'back story' at any time. Though in large part I didn't see anything in season 1 that conflicts with anything in the novel. My biggest disappointment I think was that the novel hints that there might have been something more sinister going on with the Romulan Star's nova. Season 1 didn't really delve at all into the nova event. I'm hoping season 2 maybe gets into that a bit more. Also, I wonder if the upcoming Coda trilogy will get into that at all. I get the distinct impression that trilogy will attempt to link the relaunch timeline with that of the Picard timeline, and it will be interesting to see if the nova is part of that overall story in some way. I doubt they will provide a cause in the Picard timeline, since it's very possible the show may do that in a future season, but perhaps it affects the relaunch timeline or even causes some unforeseen catastrophe in the relaunch timeline. Well, we'll see.
Anyway, for any fan of Picard I'd highly recommend The Last, Best Hope. It definitely fleshes out season 1 of the show. And I started reading The Dark Veil (while so far it doesn't seem to add a whole lot to season 1 of Picard, so far it's a good read and it's nice to see some Titan series characters like Christine Vale and Keru make the transition).