He's alright. I doubt he'll start regularly over Hojbjerg - the two are about as limited as each other.
But he is very, very good at one specific aspect - ball-winning, where he regularly scores in the 90th to 95th percentile for Serie A players as a whole. Ditto with pressures and interceptions.
He's never evolved to be more than a ball-winner, and if you think Skipp-Hojbjerg is a limited pairing, Bentancur-Hojbjerg will make you gouge your eyes out - Allegri has highlighted in the past that his stagnation in recent years is because Juve asked Bentancur to be a deep-lying distributor, which he is not and will never be.
But he can be an able rotation option for Hojbjerg in a way that I think Skipp can't, yet - and if we ever go into a game like Chelsea again where we want to set our stall out with 8 defenders, a Bentancur-Hojbjerg midfield will certainly be difficult to play through. For both sides, though - makes me think of the days of having the likes of Freund in midfield, able battlers who are a bit crap everywhere else.
To be honest, we're following an approach with him and Kulusevski that I'm not all that convinced works for us - we're trying to improve our 'floor', not our 'ceiling'. People saying we 'snatched him' from Aston Villa are deluding themselves a bit, imo, because Villa have already improved their ceiling signing Coutinho and Digne - relative to us, their squad quality has moved up significantly, while with Bentancur and Kulusevski, our gains will probably be more marginal.
In essence, we're trying to bring the yawning gaps in our squad up to about average. Kulusevski and Bentancur are that type of player - they offer us average options, imo, which are still marginally better than what we used to have (i.e, Winks and Alli, who is the player I think most closely resembles Kulusevski in play style based on what I've seen).
Whether that approach works or just fills the squad with average players is open to interpretation. But if we use them in a specific ways (bentancur as a rotation option for Hojbjerg, Kulusevski as one of the attacking midfield options out of him, Son, Lucas and Bergwijn), they will probably be reliable players.