Is there a middle way between working towards personal liberation and liberation for all sentient beings? I may be a little off-mark here, but if I understand correctly there are two broad opinions on liberation. The first where a practitioner works towards her own liberation (the way of the Sravaka or Pratyek-Buddha) and the second where they work towards the liberation of all sentient being (the way of the Boddhisattva).

Is there a middle way between these two? Perhaps surrendering a specific desire and to work towards removing one's defilements and allow liberation to come when it does and as many sentient beings be helped as possible.
There is no conflict, the dichotomy is false and is based on incorrect understanding. As Buddha said in Sedaka Sutta:

When watching after yourself, you watch after others. When watching after others, you watch after yourself.
And how do you watch after others when watching after yourself? Through cultivating, through developing, through pursuing. This is how you watch after others when watching after yourself.
&quot;And how do you watch after yourself when watching after others? Through endurance, through harmlessness, through a mind of goodwill, &amp; through sympathy. This is how you watch after yourself when watching after others.