Yes, he was the best player in a team whose main function was to make him be the most comfortable, thinking this is going to win us titles.
Considering last year squad? Absolutely, you are fooling yourself thinking otherwise.
With or without him, our best chance was always capitalizing Messi.
Do you really think he has the productivity at the top to be worth that hassle and that sacrifice?
Depends on what we want?
Do you want to start rebuild and just get a decent season while developing youngsters? Then he isn't
Do we want to fight for titles this year? Again, with current squad it is sadly of our best interest to cover for his ass.
Midfield will be overrun even if you replaced Messi with Lewa and brought 2011 midfield all over again. It won't change until we have quick outlets in attack that prevent teams from pressing us and out numbering our midfield, or getting quick players in defense to allow us to play highline ourselves and support midfield. Or both which what elite teams in past year like Bayern and Liverpool had.
This isn't 2017, the tactics are changing and the team itself is changing. The bad things that Messi brought on our head in past few years won't vanish by his removal, because it is no more exclusive to him.
This is a yesterday thinking, the whole "Messi is forcing midfield handicapped" thing isn't valid in this circumstances. Teams won't care if you can't punish them on counters and will press you to death.
Koeman subbing Coutinho for Pjanic is very telling: He wanted midfield battle to be won, only he didn't realize that the extra midfielder won't change it.
That is the sad reality of our team, we still thinks midfield win us games, but atm midfield are more reliant on the other lines, not vice versa