Gausman had a really good second half. Really good. Borderline TOR good. He actually still has TOR potential ... unlike Dylan Bundy as of now. It seems fair to chalk up the early season struggles to perhaps some communications issues with a new PC and perhaps just a sign of a young guy struggling after having had some success.
Should the Orioles trade him? Yes. They should trade Gausman ... Givens ... and Schoop (along with Machado/Britton/Brach). Those three could likely net big returns ... it would hurt for a year or two, but if you can get 2-3 guys to pop, plus some internal guys to develop, Orioles could be competitive by 2020. I mean, looking at this market, Gausman could bring in an impact package. A young guy, with good pedigree, still on the rise, coming off a superb 2nd half, with 2 years of arbitration? That smells like at least one top prospect, and a couple decent guys. In this era of the pen, the raw, but talented Givens, could perhaps net them a critical asset, and Schoop ... I could see plenty of teams ponying up for him (although long term, he might be best in the OF).
I don't expect the Orioles to go all-out, even if they deal Machado. Reading into what Duquette has said, I think he's somehow hoping to trade a pen arm for a starter, sign a FA or two SP, and if they deal Machado, to perhaps get enough so that they can be competitive in 2019. I think that's a pipe dream - most of these major trades, if you get 1 guy that pops, it's almost always a decent enough outcome.
Total side comment: I wouldn't deal Bundy, just yet. The stuff isn't showing that well, and he really looks like ... JAG. You might as well hold onto him and see if he can find any of his old form for now. I also think that dealing Adam Jones would turn off the fan base a fair amount, so in his last year, you just ride it out with him unless he asks out.