I think that you need to listen to labour’s Brexit shadow minister, that will tell you what you need to know. JC has given a very competent and reliable mp the responsibility and is content to rely on Starmers judgement being progressed with input from other labour members.
It is clear that JC from his tweets is intent in doing just that. His thoughts are constantly consumed with the poor and underprivileged, and it is obvious to anyone reading these thoughts that policy will be firmly rooted in improving their lot.
It is also clear that labour’s message is quite deliberately ambiguous. As I’ve said on another thread, Labour is not the government, they do not yet need to set out their table, mind you neither has the government. They are the official opposition and members of a sovereign parliament. Their job is to scrutinise, and debate where necessary, and subsequently vote for or against the final negotiations.