Sagan vs Ewan at stage finishes: 192pts vs 242pts
Sagan vs Ewan at intermediates: 124pts vs 6pts
There are all sorts of caveats to add (Sagan would race differently if he wasn't miles ahead, Ewan would lose some energy, Ewan was focussing on stage wins at his first Tour...) but there's definitely a chance he can challenge if he goes for some intermediates next year.
Sagan vs Ewan at intermediates: 124pts vs 6pts
There are all sorts of caveats to add (Sagan would race differently if he wasn't miles ahead, Ewan would lose some energy, Ewan was focussing on stage wins at his first Tour...) but there's definitely a chance he can challenge if he goes for some intermediates next year.