In a sense they did regarding the yellow transformations.They should've stopped at Super Saiyan 3 imo
I kinda like how they have gotten the ki of a deity now.
However they shouldnt go much further anymore in the transformation department.
New powers should come from developing new abilities and not from continueous new transformations.
DB super seems to be a lot about special abilities and more about strategic fights (a new direction which I like), rather than raw power lvl vs raw power lvl.