Yes but I do think they still would've used Rogues DNA so their mechanics can adapt. Mystique can shape shift but can't shape shift herself into powers. She could look like Colossus but she wouldn't actually have metal skin. So I'd say they still have Rogue DNA in them, mixed in with all other mutants DNA to adapt to anything. They shifted to diamond and rock form because they would have Emma and whoever else's DNA in them, but did you notice the sentinel was holding colossus when it shifted to his power. I think that is the Rogue DNA being able to take his power after touching him. My theory anyway.
Hank, using a serum derived from Mystique's blood, turned himself into Beast. He was also able to create another serum from the same base that not only suppressed powers, but allowed Xavier to walk again. It shows the miraculous abilities that could comes from using her DNA.
Mystique also showed in X1 that she could make metal claws, sure she wasn't able to reproduce adamantium claws, so Wolverine's were able to cut through her claws. But they were still metal claws.
Mystique can also create clothes, glasses, hats, etc...
She can create not organic things from her organic material. I don't see why scientists couldn't simply be able to make her mutation more focused that the transformation would actually be to what it was meant to be rather than a lesser copy.
And it isn't like Rogue in the movies has taken on the physical attributes of those who she touches. When she touched Wolverine in X1, she just got his healing ability, she didn't get his claws (bone or metal).
One of the sentinels had Lady Deathstrike-like claws. Those wouldn't be able to be replicated by using Rogue-like absorption because the nature of them in X2 is that they are artificially created.
The sentinels never use any non-physical power because they do not absorb powers, and yes I am counting fire and ice and physical powers.