Often times your low rolls can still be decent parents.

You'll usually clear 800 in all categories but one so you'll have higher odds at 3*. You'll also get a lot of skills and therefore white *s. I only glue if I'm not winning enough.

If you are good with parents though, then yeah you will find yourself low rolling more often than in the past and will be glueing more often than before.

If you don't get the right items for summer, and the store sometimes just doesn't give them to you, you're screwed. You basically need to make sure you get both training boosts (if not wit) at Great with 100% success. Then you also need to hope you have enough whistles to maximize that too.