You could say the same thing about every single team in baseball regarding an ace. It was the hitting that let them down this postseason. The Yankees scored: 7, 2, 1, 3, 4, 4 in the 6 games this series and left countless runners on base.
I think the Yankees post season managerial strategy needs to change. You can't burn your pen out by Game 3 of the ALCS. You just have to trust your starters to give your more length than the Yankees are asking.
Well when your starters aren't getting it done and you are going up against future hall of famers every night that's the strategy you have to use. Which is why they need an ace. And need Severino to stay healthy and pitch like an ace or #2 like he's shown the potential to be. No excuse not to make the best offer for Cole, if he doesn't accept he doesn't accept.
Offensively I would like more of a balance of contact guys to go along with the all power guys, but its easier said than done to make those changes. If Andujar can play first letting Didi go and moving Torres to short and DJ to 2nd could help. Letting Edwin go and finding a more contact oriented DH or outfielder and moving Stanton to DH is probably the biggest thing they could do. A lot of people want to move on from Sanchez, but its not exactly easy to find good contact oriented catchers.
All that said, we were probably the 2nd best team this year, and we lost 2 of the 5 games on walkoffs. We need a stud pitcher and then some tweaks. Not far off.