In other threads I showed that higher dimensions of 6D, 12D, or 26D can be constructed and tested when the base components are velocity vectors or velocity tensors. These frames are not the ones many researchers have preferred, but they bring the theoretical systems into range of measurable and experimental science.
Different threads explored the possibility that kinetic energy resides in a local field as Albert Einstein recommended in his Autobiographical Notes of 1949. It requires a zero velocity frame anywhere in space, a reference which was not available to Einstein.
Several prominent scientists have endorsed isotropic CMBR as a preferred reference for zero velocity meeting the needs of kinetic field energy.
QFT has long expressed kinetic field energy through Lagrange Density in the Klein Gordon Equation, a scalar product of two field vectors. Not everyone accepts QFT for a variety of reasons. The present question is asking for opinions that relate to the difficulties of QFT, and whether or not they can be removed by reformulating the coordinate system as based on velocity components instead of distance components.
Can Physics Be Reformulated In Coordinate Systems Defined By Velocity Vectors And Tensors?