This. I feel people are overestimating the necessity of elemental damage on most situations. Sure Nightfalls require them - both for the burn and the Epic modifier placing shields where there normally aren't any.
The overwhelming majority of the time you'll either be shooting non-shielded enemies or hitting those shields with a secondary outside of Nightfalls though.
Dregs, Vandals, Shanks, Thrall, Ogres, Acolytes, Knights, Psions, Phallanxes, Legionaires... Everything except Captains, Wizards, Minotaurs and Centurions is going to be the same when using kinetic or elemental primaries.
Make no mistake - Fatebringer is my favorite gun - elements are super useful. But saying a kinetic primary is generally wasted on PvE content is a bit of an exaggeration since it'll nearly always make no difference.
I'd far rather rock my new Red Hand IX than Word of Crota. There's plenty of pulse rifles which play better than the VoG and CE ones despite being Arc for instance.
Perhaps this perception is slanted because of how good some of the elemental primaries are. The thing is, a kinetic Fatebringer would still have been the PvE monster because of its base stats and perk harmony. Vision of Confluence is a great scout - full auto with nice perks and stats, and would have been popular even without the Solar.
I too would have liked PoE 35 to have guaranteed elemental primaries, Crota style. Or with an Adept Weapon Core or whatever. But if the weapons are bad, elements aren't gonna fix that. And if the weapons are good, being kinetic won't change that.
I need a Solar Hand Cannon in my life though