In my opinion (don't @ me bro): The last credible leader and party we have in this country.
The way I see it, the only remotely "leftist" options we have are Zach "I can make women's breasts bigger through hypnosis" Polanski, Corbyn's not-quite-a-party that can't-quite-decide whether trans people should exist, or the Lib Dems.
As much as people see Ed Davey as a "joke leader" because of his stunts (because the media would only platform Mr Toad otherwise πΈ), I'm increasingly impressed by him. He's on the right side of basically every issue lately, you guys.
And is often the only person who is.
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ETA: He also wrote to Kemi Badenoch and Nigel Farage. His letter alludes to that but doesn't make it super clear.