As per VNDB, “Netori is a counterpart tag to 
	
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, however instead of playing as someone who has his significant lover stolen, you play as the one doing the stealing.”
This is subject to change as anything else, but there is no indication that we’ll ever get Dex’s perspective (I'll double check if Dex's internal monologue ever shows up and correct myself if necessary). It's always been limited to Kate and Johnny's.
The two perspectives aren't the same? I like FMC NTR.
Sure, it'd be nice to separate out all the POV's in theory, but this isn't HC's first rodeo. If there was a demand for distinct POV's, then he'd satisfy that demand. It just isn't there. The majority of players are fine with the way things are.