Yes, as I said, it's fair to believe Ironwood is hiding things, but we can count some things out. We haven't had anything give us insight into Atlas's capabilities other than the Paladin Mech, Penny, and the aura transfer device. We haven't had any hint that Ironwood has an "ace-in-the-hole" tech - In fact, it seemed that Penny was made to be that "ace", while the Paladin was a front.
So to just suddenly pull out a "wireless aura-capture" device out of the blue doesn't make sense, without proper buildup. How exactly would this be relevant in Ironwood's campaign against Salem? And if it was crucial, then why haven't we had any hint about it?
The last thing I want is for some device to come along, unexpected and 'secret', and just drop Pyrrha in front of us. To me, that is what this 'aura-capture' device sounds like. I'd expect Salem to be the one to do such a thing, not Ironwood.