Too bad Tabata couldn't grow a pair and ditch all of Nomura's designs from the get-go. I don't see the point in keeping the Roadstreet Boys. Based on this redesign, Tabata CLEARLY does not like Nomura's Noctis.
It's not about growing a pair, it's about him being very aware of what his job scope is. He wasn't put in place to create a brand new game from ground up. He was put in place to salvage a project which wasn't moving in the direction the company wanted, without making it seem to the fans that everything they have been shown so far is a lie. So his job is to take everything he can that has been revealed so far, and reassemble it into a game that can be shipped, while ditching anything that hasn't been shown or anything that really cannot be used.
I think a good comparison is Platinum Games taking over Metal Gear Rising. They reused a ton of concepts, assets, etc. But they also requested a total revamp of the scenario. The gameplay and level design was made mostly from scratch, but even then they tried to retain as much as possible from what had been revealed to fans - so stuff like the Zendatsu system, the freeform cutting, etc was worked into the game so as not to disappoint people who had been following the game since it was announced.
The main difference between MGR and FFXV is that Kojima himself put out a video explaining that whatever they worked on to be scrapped because they sucked shit and failed to make a good game, and that Platinum was going to do a kickass job from here on out. They owned their mistakes and made the transition as smooth as possible for the new developers. Tabata on the other hand has been fighting an uphill battle since day one because Square Enix can't own jack shit. They wanted to leave Nomura on board as director for the XV announcement, then they shuffled him out, and the removal was clearly not a mutual agreement. This leaves a lot of doubt in the minds of fans who have been following this. What happened? Who is right? Who is wrong? Was Nomura's vision no good? Was management just being jerks to him? Who is this Tabata? Why is he changing everything? Where is Stella? Who is this Luna? Fuck everything! Etc.
If they came to a better agreement on how to handle this, and were totally transparent about it, like how FFXIV 2.0 was handled, this would be much more pleasant for everyone. Fans, Tabata, Nomura, everyone. The first step would be to admit what fucked up with Versus and why. To this day, no one wants to own up to that.