"if a god can die then how does his heart survive? he is deadroth" a quote from mankar camoran.
By this point he's just rambling. Since Shor gave his essence, thus, putting his hand into creation of Mundus. He cannot be daedric. The daedra only came to arise, in that they were Padomay aligned spirits that did not participate in the creation of Mundus. Shor, while at first fitting the bill due to his alignment towards Padomay, cannot be called daedric, because he put his essence into the creation of Mundus. As such, he is just Shor. The aedra are Anu aligned spirits that gave themselves up to creating Mundus.
Are we to say that Malacaths realm isn't a deadric realm because he used to trimac?
The other princes do not consider him a daedric prince, nor is he technically one. But one could summise to say that once Trinimac passed through the lower intestines of Beothiah, he transformed into a Padomay aligned being. And since he did not participate in the creation of Mundus, he could be called a daedra. Also, he had the power to change, and this is evident when the aldmer that fallowed Trinimac turned into orcs