@Harawana
I think you have some excellent points of view on this subject.
I would just add in my own opinion that I think Ghost Studios is maybe running out of ideas.
So in a last-ditch effort, they may be decided to take parts of other NFS series and cross play them together.
So your right NFs has not been truly authentic to its own branding in the series but have become a mix up of the other NFS titles.
We clearly will and do see Underground and Hot Pursuit aspects in the new NFS Heat game and in former titles before Heat.
I think this has become the new M.O. for Ghost to mix it up which leaves fans feeling kinda mixed on the direction of the NFS franchise.
Hopefully, we will not have too many headaches with NFS Heat.
Take care and have a good day.