I still think he's just saying what he needs to to get elected. He did the same thing in order to win the labour leadership contest.
He knows he's going to piss off either GC women or TRAs no matter what he does. He probably knows that trying to tread a line down the middle is going to piss off both (take a look at UK trans spaces on reddit, they're just as wound up at him as people on here are).
But he also knows that both those groups are small compared to the number of people who just don't give a shit. The people who don't understand the issue, haven't spent the time needed to be peaked, who just wish that everyone would shut up about it and focus on the economy, the NHS, the things that affect them day to day. Those are the ones he really doesn't want to piss off.
The Torys have very few attack lines on labour at the moment, trans is one of them. So he's trying to take the heat out of it, make it a non issue, so that they can't attack him on it.
I have no idea what his position will be after the election. I think his preference will be to do nothing, there's a lot of shit to fix and there will be a temptation to chuck this on the back burner until something forces him to deal with it. He seems to me to be a sensible yet ruthless man, he'll have seen what happened to the SNP when they pushed too hard in favour of trans rights over womens rights, so he'll be in no rush to go there.
Eventually though there will be some story that cuts through enough that he has to take a stand, and as he has no personal skin in the game, he'll see which way the wind is blowing and probably go with whatever he thinks public opinion wants. So we need to keep making as much noise as possible.