I think he is going through the expected growing pains you would expect from a kid who would be a HS player right now, who is spending his first year in the States. Aggressive promotion, but he was excelling in the Complex as noted. He is overmatched, and will either adjust this year and could be a second half break out player, or he may continue to struggle this year and hope to work on those aspects (pitch recognition for example) in the offseason. He is a good player as noted by his early ACL success, being highlighted in the Prospect Showcase game, but he is also not at the same level as Made, Pena, and even Lara or Yophery yet.
I have been trying to figure this one out too. I wonder if it is that they want him to log more innings on a more regular basis so reliever in a pseudo-piggyback role. I don't recall another prospect doing that recently, and I would have to look at his actual games last year in the ACL and see if the first innings were a problem for him, or if it an issue facing batters the 2nd time around, and they are trying to build him up for success now, and then test him more later.
If they viewed him as only a reliever he is not getting typical reliever outings as noted. And it would odd for a draft HS pitcher to be relegated to just a middle/long reliever at such a low level so early in his career. I suspect there is a plan, and I would hope he will be tried as a starter this year or next.