Not a Lewis fan but it’s a solid move and not just a bucket list thing. I’m sure he saw what Schumi did in turning round the clown show at Maranello and fancies a crack at the same thing, it would be his greatest achievement if he pulled it off and would not damage his legacy if he failed.
Great for the viewer too to see him compete with Leclerc and also gives Russell a clear run at being Merc’s unofficial lead driver (they always have one despite the spin).