Collette Hawthorn - Fitting Issues!

This pattern is a lot different than my TNT shirt dress. The armscye is obviously too small and too high. These pictures are after I took out a little in the side seams and graded a bit off the lower armscye. It's really tight at the upper back and shoulders. What should I do? Cut out a larger size?

See that bunching?

As for the front, this bra is a little on the small side. The tightness in the back makes it impossible to close the front with my normal bra.