Sounds like you are talking about his very close range putt style which I would call a stab / jab putt. It seems like it's mostly an elbow extension for power and then some wrist and maybe finger action to spin the disc. Kinda similar to Matty O and Chris Dickerson. This style isn't powerful imo (but he only uses it while close). The disc / hand is held out in front of the elbow so the putting power pocket where the disc can be curled / pocketed more behind the forearm and elbow flared out (internal rotation) isn't missing which forces you to just jab with elbow extension more to get power.
It does feel easier to be on-line at close distances though so it takes the nerves out of slight misses on those putts where you are close enough that you know you shouldn't miss but sometimes are slightly off.
With more of a spin putt, the elbow extension is merged more with external rotation motion, which means the elbow extension can contribute more to spinning the disc and getting more power form the an arc / curve / swing feel out from the body forward and to the right from the external rotation hence more left and right misses. Adding more arm lift into this equation gets you closer to a spush putt where it's easier to stay online but then miss more high / low.
His normal putting style from distance is more of an arm lift hyzer style with a lower reach back. Interestingly, from further distances or on terrain where this style isn't good, I've seen him do a half throw half spin / spush putt with a flatter release that looks really clean and low wobble with high spin. When I saw that I kinda wished he'd just train and stick to that as his main style, but I'm guessing the more prominent up and down on-line arm lift hyzer putt is easier to be on-line with nerves.