Anything less would be disconcerting and unhealthy.
There's a sense that both Clegg and Cameron are not going to be pushovers and are going to be willing to draw lines - but Cameron (rightly) has the stronger hand henceforward, and Clegg should know it. If there has to be another election, Cameron should be holding all the right cards - and as long as the Labour Party spends the traditional 5 years beating itself to death - Clegg knows he should sail back in.
But Cameron's first internal move to appease the loyal backbenchers (sans maisons des canards) must now be to fire his close advisers who let him down so comprehensively in the election campaign. Not only would that do Dave a big favour, it would appease a lot of powerful party members who must now be mumbling "told you so".