One way to push through change is to overwhelm. Present multiple choices, ensure the complexity sows confusion, and add time pressure. Fairly quickly, you’ll be asked for a recommendation which is your chance to state your logic and make your pitch. Problems and frustration will appear later, but you will have the ‘sale’ and can move on.
The other way is slower. It involves the same conversation countless times, in countless different ways. Listening more than speaking is also a critical factor so you learn where the others are at, their fears, pain points, and needs. Complexity is present, in fact everyone’s understanding will become more complex and nuanced as you are together. The choice is slow in coming, but once made, implementation is smoother as buy-in is high.
Are you looking for a fast choice and challenges later or a slower choice with less future problems?