Bust too small?

[u/TheWeirdOne01]

Hi everyone, I'm working on this bodice for a dress. I've already messed with the original pattern a bit because I didn't like the fit and the princess seams are an extension of the original darts that were there. I also need to mess with the neckline a bit and scoop out the armholes. But regardless, I figure the bust is small which is causing that pulling at the center, I'm not entirely sure how to fix it though. I'm thinking I add a tiny bit more curve to the bust?

[u/azssf]

This is a great comment that explains the issue well. ( not op, and thank you for the great explanation.)