As the story said, this is curious to say the least. Obviously these depth charts this time of year don't mean a whole lot. The team could be trying to send a message or simply reward Hill for good play. It wasn't all that long ago (2014) the very same Saints caused a lot of stink by putting Pierre Thomas as the team's RB3 behind Mark Ingram and Khiry Robinson.
NE TE Michae Hoomanawanuil - 2014 Fantasy Football Outlook
If Gronkowski was inactive for a game, and Hoomanawanui got the starting nod... and you were really desperate at tight end... you would still be scraping the bottom of the barrel to roll with Hoomanawanui. It's always possible he'd grab a lucky TD in that case, and listening to a friend try to pronounce his name might just make it worthwhile. That's about all we're talking about here, though in terms of upside.
His upside and downside are remarkably similar.
There is no league or draft deep enough in which we can recommend drafting Hoomanawanui. He is safely ignorable in literally any format.