I might be in the minority here but I enjoyed the 1st season of Picard. It might be because I've been a huge fan of the Romulans since Balance of Terror.
I liked it too, and so I am assuming did quite a lot of people did too or they would likely not have made seasons 2 and 3. People who disliked season 1 (and/or 2) tend to be very loud about it, but don't mistake noise for majority.
Interesting, I never liked Section 31 (the whole concept is completely against what Star Trek is, IMO).
To me, that's what makes them such great villains! I was a bit concerned that the section 31 series would make them the heroes, but that does not seem to be happening at all now so that's a relief.
They already had Wesley last season. But with Changelings showing up, there's really only one big cameo that DS9 fans like myself will be looking for.
I consider myself a DS9 fan, and I am not sure who you are referring to. Sisko? Rom?
EDIT: It's Morn, isn't it? Just make sure its not a speaking part, there are only two epsiodes left!
It's actually canonical, though still awkward. In Voyager they establish that the holodecks are on a separate power grid than the rest of the ship, and there's absolutely, positively no way that power can be transferred from them to anywhere else. Thus, regardless of how resource-starved Voyager gets in the Delta quadrant, they can still have holodeck episodes.
Voyager had it be a fact, but did not explain why. Picard stated that it was a deliberate design decision rather than a bizarre engineering oversight.
I vaguely recall that Changelings in DS9 started incorporating human blood, from.... sources, in order to get past the blood test thing. Someone who has watched more recently would likely know better.
That was suggested by Ben Sisko's father IIRC as a way they could get around the blood screenings. I do not believe it was ever explicitly confirmed that that was actually how they did it, but given some of the long-term infiltrations that were eventually revealed they must have had a way.
Geordie talks about how Data can't kill people. But, he had zero problems flat out murdering several people on the bridge when there was zero reason to do so. If you have control of the ship, you can simply use the transporters. Or drop a force field around them. Or increase the gravity locally and immobilize them. Or flood the area with gas. Or... or... or...
Geordie was wrong - we have known since TNG that Data can kill when the situation warrants it. And when a hostile group has taken over your ship and is threatening to murder the whole crew (and has demonstrated herself willing and able to carry out the threat on some crew members already), the situation warrants it!
Also, they did not have control of the whole ship, yet. And most of those things you mention as alternatives would not have worked against changelings at all, and those that might would have been less reliable than what they did do. Even if that had access to all those other systems, which is by no means a given.
No attempt to take out their engines. Nothing. Flat out killing every single person on the enemy ship when their shields were down and you had multiple options.
Leaving a heavily-armed ship like that lying around for whoever happens to come looking, even with the engines disabled, is just asking for trouble. Much safer for all concerned to blow the thing to hell.