So are you just dropping the whole the lib Dems are only not supporting Corbyn because of Brexit then ?
As for your question well yeah if getting someone like Clive Lewis in meant Labour would win a general election and put forward a left wing manifesto then yeah I would(I'm not as fascinated with Corbyn as well the people who dislike him are)
But
1) Corbyn has come out for a people vote, so er...... him being a
secret brexiter is something in your head.
2)There nothing to suggest simply replacing Corbyn with a more openly pro Euro candidate would get labour into power(Or for millionith time gets us another referendum)