Note: This is NOT a post asking for them to return, this is just a suggestion to fix the underlying problem.
Diversity vs Character. The weapons in year 2 are geared towards a simple goal; diversity. They are designed to step away from that year 1 mentality of the "ultimate setup" (like fate-bringer + black hammer + G-horn), and in trying too hard not to make weapons over-powered in PvE, weapons are being watered down so that none outshines the other like back in year 1. How does this work? Random perks.
random weapons + random perks = everyone having different guns and therefore diversity. And while that works, it dulls the overall experience of fighting in Destiny.
In year 1, this was the case only when you just hit level 20; there were a set of weapons that were geared toward having character and they made you aspire to get them because back then there were a lot legendaries too, but something made some stand head, shoulders and dick above others; fixed perks that worked well together to make them truly special; Raid Weapons and Exotics. When you said any of their names, everyone who had one knew how it [i]played[/i] and what made it special. Found Verdict that tormented the crucible for months, Black Hammer, the shredder of bosses, and how can we forget the Hunger of Crota; the hipster Ghallahorn. The mere mention of these gun's names makes any veteran player remember the [i]feeling[/i] of using it, not just what numbers are on the light counter, but TTK raid weapons are watered down to be in the same pool of lukewarmity as every other legendary.
Of course, in year 1 some legendaries were better than raid weapons but that was only because of their own merit in being truly good weapons, not the raid weapons being weakened to insignificance.
And it wasn't just raid weapons in year 1; you had iron banner weapons where you could get the perfect perk roll, and exotics truly worthy of the name, and HoW just EXPLODED that list with the gun-smith and re-rolling; though it was flawed, just talking about your weapons and their perks made it sound like you were a serious hardcore badass technician, fine tuning every inch of his tools of destruction.
With year 2 weapons, all that is gone in favour of diversity; random locked perks on all guns, including raid weapons. Now let's be fair, the new IB weapons retained this customisability, but they are only a pair that showed up after the 2 straight months of lukewarm weapons. Exotics still have character and that reminiscence of year 1 weapons; they still have that uniqueness and slight OP-ness in PVE that made year 1 weapons so loved, but you can only use 1 at a time, and then every other weapon is just random; there is no way to work towards the perfect weapon set you once had, or something new, unique and truly [i]rare[/i]. So that's why people want their year 1 guns back; they want a gear set (not just weapons) that complements their play-style; not just random weapons with big light numbers that might as well be reskins of one another, but an actual synergistic flow of weapons one has an sentimental attachment to.
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tl;dr: making every weapon (except exotics) have random locked perks hurts the user's ability to create gear sets that complement their play style, and actually kills weapon diversity since everything might as well be re-skins. In year 1, Raid Weapons, exotics and re-rolled weapons made this simply not true.