While I am glad you have enthusiasm for Callas's immortal voice, your swearing greatly detracts from the general aura of what you write.
Verdi wrote four roles specifically for the spinto voice (Desdemona, Aida and Leonora in "La forza del destino" and "Il Trovatore"). Neither of Verdi's Leonoras is a coloratura role, but his Gilda and Alzira are in accordance their respective scorings. The salient point here is that Verdi wrote for many types of voices and he - like any other composer - chose them according to the overall needs of a composition.
The spinto voice is not all that common (Sondra Radvanovsky is the only contemporary who comes to mind) however that does not mean that roles such as Leonora cannot be sung to great success. With that in mind, I simply reiterate my opinion
that the recording of Callas here does not adequately showcase her gifts. Contrary to your statement, I would add that she does not sing coloratura in the recording and that it would have sounded odd if she had since the music does not invite it. For Callas and coloratura, check out recordings of her singing Lucia.
Saying, as you do, that Renata Tebaldi was not a soprano to me suggests you have not heard a great deal of her recordings which, to people with pitch perception, greatly support the belief that her upper limit was C6 (which she hits in this recording) but that it began to escape her with age. Also of note were her great high, sustained pianissima and clear chest/head glissandi.