I think the team is good enough to win witgout mcdavid.
Yamo or marody need a cup of coffee anyways.
They are pretty deep imo.
Their win percentage in games where McDavid didn't score last year was horrendous, as in like close to the record the 74-75 expansion Washington Capitals had (worst team in NHL history).
So no, they're not very deep right now, they are the exact opposite of that.
Tampa, Toronto, Pittsburgh, Winnipeg ... those are deep teams with lots of fire power upfront.
Oilers are 1 line and then hope & pray you get something from the other 3 lines.
Once Yamamoto, Puljujarvi develop into guys that can legit make NHL defenders worry and be the difference between winning and losing, sure you revisit that, but right now, they are a one line show.
Whatever line McDavid is on + 3 other lines that get dragged along.
The other thing is there is a stunning lack of chemistry with this forward group. Other than McDavid + RNH or Draisaitl there's not really a bunch of combinations that you go "Wow! Those 2/3 players really click with each other!". Lucic plays well with none of the three centers, Strome is a player who shows up every third game, Caggiula clicks with no one, RNH or Drai with McDavid work, but RNH + Drai together doesn't seem to work great, etc. etc. etc.