Did I Miss Something About the Scouts?

He mentions his scouts, now and then, but not these missing/captured scouts. There's really no build-up. If Drack isn't there to tell you they might be aboard, there's even less warning that they'll suddenly appear in a decision point. We have a thread about this. I'll try to add a link.

Edit: bsn.boards.net/thread/7504/horrible-after-hunting-archon-deciding

Correct. It's called 'Drack's missing scouts'

He also talks about it a bit in the nomad, I think. Not sure though.

Not exactly. It has some minor SP-rewards - creds, resources, research points,  a random chance to drop a rare weapon. And all it takes from you is pressing a button once in a while. It's also the only source of mission points, which can be spent for some MP upgrades and\or upgrading your APEX teams (if you're into that kind of things). 

It's also the only source of mission points, which can be spent for some MP upgrades and\or upgrading your APEX teams (if you're into that kind of things - a total waste, IMO). 

Wish they had handled it better, it had its potential. E.g. I loved those little table text-quests from DAI, many of those were interesting to solve. APEX is nothing like that.

IIRC, since I had Drack with me on Elaaden, he mentions the missing scouts at one point while there. Don't quote me on that though, so much going on in the game.

That actually makes so much sense I have no idea why they didn't think to just do that.

Not only does Drack not mention his missing scouts, he goes so far as to tell you he is alone, hunting solo, which is why he travels so light when he moves into your kitchen. So, no. There is no reason to be aware of them beforehand.

I never saved them because what kind of Krogan goes and gets himself captured anyways?

It's definitely less impactful. Still, it could be important. Raeka is a big deal; and worth having around in the future. Conversely, choosing (or not choosing) the scouts could have a huge impact on how the krogan view Ryder, down the road. Ryder is, at present, the tie that binds a lot of groups together. Bitter krogan could make the claim that Ryder only helped them, previous to this choice, in order to get what was best for the other species. (Help the krogan to help yourself.) Whether that's true is likely an RP-thing.

I suspect that BioWare has become more careful in letting us make big decisions that would introduce major variables. By ME3, we had people complaining that their choices didn't matter, and who weren't referring to the endings. If BioWare let us blow up another Council, or whatnot, they'd have to account for that variable. That would likely just lead to people bitching about their handling of the disparate outcomes. Everyone around here is an armchair writer and game dev. Keeping things moderate makes their job easier.

If memory serves, he didn't like Morda. Moreover, he may have felt a stronger bond or responsibility towards the scouts. I gave the core to Morda simply because I felt bad for Drack.