I think it is currently fine. But it is somewhat RNG dependent if you get them early or not. Even so, I actually deployed one around 10 times in a single engagement late in my run and did the rest while fighting the CEO. Try to look out for construct drops with a deck that benefits or built around redraws
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From the ones you can pick up at the beacons some are very potent.
A few that are my beloveds are an LT one that applies Energize onto any ship that you played a tech card too. Which can be very potent depending on what kind of deck you have especially if you have Energize AMP upgrade on anything.
My favourite FLO one is the ECM Jammeroid I think it's called, which negates the point defence so your small craft won't deplete.
A generic pool one is mass produce 3 hypershield, great to block a lot of damage and your next redraw you could pull it again.
Another generic is a 1 hypershield mass produced construct that has a 3 timer and 6 damage shot. Everytime a mass produced unit acts it deals self damage but with how it helps to redeploy them sooner I do not mind generally. If you want them to stick around you could apply more shields to it
But overall, there's a fair few useful ones and anything that can take a hit from a boss instead of your ships is pretty nice.
Yeah, I mostly use them as cheap cannon fodder, to be honest.
I still think the mass produced ones show up to randomly, too rarely. Last run I needed to go to the fifth system and only then found a place to pick a construct - just to find out that not a single mass-produced construct was among them. So I completely canceled the otherwise great run and had to start over. Pretty frustrating as I am just trying to unlock that commander.
My least favorite faction is the trade union, by the way. I understand their strategy and purpose, but prefer to quickly move in and waste the enemy instead of slowing the opponent down and have fights that drag on endlessly. Further, in deck-builders, I generally dislike factions that function well only based on an additional resource (cargo in this case) that otherwise is not of any use in the game. I always think that this unnecessary complexity is not needed and no fun whatsoever and those factions fall flat for me because of that.
Edit: found a way to cheat me into getting a mass produced construct. If there isn't one as one of the three options, just quit to the title screen and reload. You get a completely different set of construct options.