I don't think debatable is the right adjective for this question. Still the answer if Lampard and will be Lampard for some time.
Lampardgate is the only true problem the club created for itself. He "signed" for NYCFC and was "loaned" to Man City and it was "extended" until the end of the Premier League season. This created a huge problem for NYCFC from top to bottom. Front office debacle. Roster/formation problems for Kreis. Unfair treatment to season ticket holders felt being lied to. I'll elaborate with that middle subject. From the document Win! we saw that Kreis believed that Lampard was going to be here from the beginning and created a lineup around him in the midfield. When that wasn't the case he had to improvise and the lineup and player that he did use clearly did not have the talent that Lampard would have on the field. Lampard came in later, was injured playing in Premier League, and didn't do shit in 2015. Kreis was fired. Vieira was brought in. Imagine the scenario if Lampard was here from Day 1 and Kreis could do what we wanted. Sure, it wouldn't explain the shit defense and goalkeeping but still, maybe we qualify for the playoffs. Maybe Kreis keeps his job. Maybe we don't see Vieira ever in New York. A lot of what ifs, but still it could be asked. We saw what a healthy Lampard (in Vieira still albeit) did in 2016. Imagine if that happened in 2015.
Mix was the fault of himself maybe not being as good as we thought, training as hard as we thought, fitting into a system we established, or focusing on soccer. But ultimately, you can say it's the fault of the front office giving him a crazy contract. Still, it's not a huge problem. We brought him out during the offseason. Small problem considering we did fine without him in 2016. It's really just a problem for Mix fans (or fans that could consider who we could have bring him with his GAM/TAM money in 2016).
The stadium is politics. We had the Bronx site ready to go but shit (maybe de Blasio, probably de Blasio, definitely de Blasio) fucked it up. It's a work in progress. It will take some time, but the front office is committed and something will get done before I have kids. I don't plan of having kids anytime soon though.
"Chris Wingert is someone you build a lineup around." Or something like that. Kreis couldn't cut it in New York or with CFG. He wasn't respected by Villa or Lampard or Pirlo. Simple, he had to go.
Johansen wasn't as great of an option early on, but still Saunders had a great save percentage in 2015 because so many shots were allowed by the defense. Should Saunders have been benched earlier. Maybe. (YES, in my opinion). But it's a moot point. We have Johnson now.
It will take some more time to get an answer on Pirlo. But up to this point he's done what he needed to do for NYCFC. He's still part of Phase I to sign DPs for headline, tickets, and jersey sales. We've moved on to Phase II, sign DPs that are better talents in MLS for our team. Maybe Pirlos replacement will be a big name but they'll be able to do more on the field than Pirlo for our system.
Lineup. Whatever Vieira does. Whatever it takes to win. Fuck it.
Clone Jersey. It's fucking beautiful. We're in New York City, fashion capital of the world. Capital of the world. So what if it's a beautiful shade of blue that happens to be the same as one in Manchester. It's fucking gorgeous.
Nickname. We're pigeons and we'll poop on you. I haven't heard anyone refereed to NYCFC as pizza rats.