I think we can learn for the penrith/burton situation, storm/smith has shown anything is that it is important to hold on to your capable back ups.
Grant went down, smith slipped right in. For penrith Cleary went down and burton slipped in without skipping a beat. If penrith let him go early, it would have served to make an opposition team stronger whilst making theirs weaker.
We cant release walsh because if isaako goes down he comes right in (he may even come in when he can if isaako continues to contribute very little).
We could consider it if we could get hynes early