Rod Staffwand
aka Ermlaspur Flormbator
What you're suggested in creating a randomized list of possible maneuvers/attacks that can be used it round. This would model the fluid tactical and situational changes in a fight and allow a fun diversity in options. In the Yahtzee example, a player would also be able to pick and choose dice (maneuvers) as well as potentially risk dice trying to get a Yahtzee supermove off. This gives player agency, which is also fun. These are all admirable design goals.
On the downside, Yahtzee turns are typically three rolls, with dice selection in-between. Each turn a player would need to do that--and then resolve with one or more attack and damage rolls. That seems cumbersome and overly elaborate to me.
Then there is the gimmick factor. This mechanic is definitely a gimmick not seen anywhere else in 5e's design. Could it be fun? Sure! Can it work in a home game? Absolutely! Will it ever be seen as a legitimate replacement by a large portion of the gaming community? Nope, never.
On the downside, Yahtzee turns are typically three rolls, with dice selection in-between. Each turn a player would need to do that--and then resolve with one or more attack and damage rolls. That seems cumbersome and overly elaborate to me.
Then there is the gimmick factor. This mechanic is definitely a gimmick not seen anywhere else in 5e's design. Could it be fun? Sure! Can it work in a home game? Absolutely! Will it ever be seen as a legitimate replacement by a large portion of the gaming community? Nope, never.