He has shown glimpses of offensive moves in practice, but it is literally footwork and getting those moves down, before we assume adding strength or other things.
As much as Luka Garza gets away with murder with dragging his pivot foot (traveling) and throwing shoulders and elbows to create space (because he's not a speed or leaper that jumps over players), Garza is as fundamentally sound as any post player in a long time.
It will take time for Cliff to become the player we are looking for, but it's down to footwork and getting comfortable with it matching his athletic ability. Myles is also a very good player with fundamentals on footwork, pivots, and how to approach the play on both ends. Myles staying and continuing to develop into 1st team all B1G, gets accelerated by working with and against Cliff in practice.....and Cliff gets sped up in his development by getting to learn against and from Myles.
The only problem is trying to balance what Cliff can do now (run, lobs, dunks and scoring in close) to the expansion of his game and making passes when teams double team the post....lots to learn as a big man....it takes ton of hours and builds confidence to take it from the practice facility to game situations.