Kuss even specifically said that he'd like to go to the Giro with Kooij and a sprint train, so the onus is off him and he can just do whatever he likes. Sounds like he's put some thought into it.
Not that Kooij needs a sprint train. Jumbo are not very good at the leadout business but Kooij tends to find his own way.
Yeah, Kuss has been low key riding for GC in both the Giro and Tour, with the exception he lost a huge load of time in some trivial Giro stage early. But he seems to want to do his work and then keep going till the finish now, which is just fair game IMO. It's how Yates got 3rd at the Tour. Maybe Kuss will wanna do some work on his ITT in the off season, and GC Kuss will be a meme no more.
Kooij not needing a full sprint train is pretty good as well. You can send a balanced squad to the Giro with some younger climbers that can go for stages on one hand and do some work for Kuss may he need it. Kooij himself is a decent flat engine that can get himself in the odd breakaway if breakaway formation is flat too.
The only hiccup for Kooij is he's raced nearly everything with Van Emden IIRC and he's retiring.