Weakness - original phase model outlined by Rollie and Duck is incomplete
Rollie and Duck states the process of breakdown of a relationship doesn't stop after grave-dressing.
there's a further step by which we move on to a new relationship, learning from previous one, trying not to do same things again.
named the 'resurrection phase'
ex-partners turn their attention to future relationships using experience gained from previous relationships.
Rollie and Duck make it clear progression from one phase to the next isn't inevitable and partners may return to an earlier phase.
Weakness - suggests Duck's model is a limited explanation as it doesn't account for dynamic nature of breakups with their uncertainty and complexity. Therefore, overall power of Duck's model is reduced.