Like I said earlier, this is a game that'll be difficult for both sides to win. Chelsea's inconsistency this season have given room for clubs like Everton to play them away and still have that belief that things might go their way. If you're a heavy gambler, the best option to go is that both teams will score. Everton currently has a team that's strong enough to beat any club in the English Premier League and playing against a Chelsea side without in form defensive midfielder Caicedo, stopping Everton from scoring at Stamford bridge this afternoon will be very difficult.
Come Palmer like you rightly mentioned is back to the Chelsea set up and is very likely to start but what we're not sure will happen os if he'll play at his peak today. Should that happen, then Everton will have to play the whole games sitting at the tip of their nerves.