An important fact in changing mouthpieces is that the new mouthpiece will only play the way it does for one time, especially if you feel as if you’ve reached Valhalla. the end to the problem of mouthpieces. Don’t believe it, for you ,and your embouchure are playing the new mouthpiece as you did the one you have just left and been playing for as long as you have.
Only during the next time you play the new one will you begin to determine its qualities and how you are beginning to acquaintance yourself with them.
So, as to a new mouthpiece, my suggestion is to change only when your mouthpiece isn’t allowing you to play , find reeds, make your sound, and play in tune.
Otherwise you are simply swapping one set of variables for another, which can be fun if you’ve achieved your technique, but can be a slippery slope if you have not, leading to preoccupation with trying “one more”.
There are only a few so-called craftsmen who really have the hands, ear and the sensitivity, and are not just sellers of Zinners, practically untouched.
There is a wonderful chapter in William Ridenour’s “Educators Guide to the Clarinet”, which goes into mouthpieces very simply and comprehensively and can save the reader time and money and bring understanding to the effects of the various aspects
Play well,and stay well.