Currently, I am working on adding a technique from the tongue controlled embouchure, but it will be what I call a light duty technique and not really instrumental in improving upper register. However, every little bit helps, right?
I am not impressed with most trumpeters who have mastered T.C.E.
If you have an abnormally small tongue or abnormally large oral cavity making it almost impossible to gain compression, well, that would be a case to sincerely try T.C.E.
I would estimate only a fraction of trumpet players, say less than 1% having some kind of abnormality that would require something as radical as T.C.E.