There is no such thing as "different opinions". As long as you do it with your heart, you can find out the taste preferences of each kind of people. So you can make a personalized menu to divide the crowd, and grasp the market trend according to the characteristics of season, region and time, so you can have a good foothold.
It is normal to bring forth the old and bring forth the new in milk tea, but the quality and taste of classic and signature milk tea must be guaranteed in place. The confrontation between new products and classics is an eternal topic and a very interesting existence. Grasp the scale, you can play the routine of product marketing. At least I think so myself.