[Designincase]

The MCU sculpts when they got good were 3D scans of the actors faces during the production of the film.

In this situation they are working off low quality pictures from the 90's and early 2000's in addition to fitting them on the ball peg.

I think they did 3d scans of the Beast Morphers team. With Drakkon they had a really good HQ reference from the teaser JDF did.

Not that I can agree with you on your picks. I think all the red rangers have been on point. It's Zack that really stands out as the face looks good.......it just doesn't look like the actor.