That's is the discussion.
No it is not. Not on this thread, and if you are worried about balancing the fighter class, then you aren't really worried about what then fighter class would be. Your driver is balance.
It is super easy to balance fighters"
Give all monsters -4hps per CR
Give all monsters +1 on saves and ability checks per CR
Eliminate constitution bonuses to hps for PCs.
These three things alone would more than make up for the difference between casters and non-casters in combat without touching the classes at all.