The problem isn't that they are flushing out the old weapons, the problem is the only good weapons are the old ones. [b]Since Vault of Glass they have only created new crappy weapons that are worse than the weapons we already have.[/b] Since Vault of Glass there have only been 2 weapons on par with the weapons from VoG: Black Hammer (which is totally getting nerfed to junk) and The Scholar (Adept) from the Lighthouse in Trials of Osiris. Everything has been much worse than the weapons from Vault of Glass and Iron Banner which have both been in the game since day 1. [b]If they gave us new weapons that were better than our old weapons we would be happy to replace them. [/b]When I got my first Arc damage The Scholar (Adept) I was happy as hell to replace my Fang of Ir Yut (partially because the Fang of Ir Yut really wasn't that good to begin with). In typical MMO's where they make the old gear obsolete they introduce new gear that is much better or they offer a transmorgrification system where you can take your stats and perks from one piece of gear and apply them to a new piece of gear. Destiny isn't doing either!

We haven't seen the new raid weapons at length yet In ttk so we can't say anything

We've seen the perks that are being taken out, even out of old gear, so yeah, we already know the new stuff sucks.

We know the basics perks not the raid weapon perks the perks we seen are from basic legendary gear

I disagree. VoG does have some good weapons but so did Crota. Sword Breaker, Fang of Ir Yut, Song if Ir Yut, Hunger of Crota, and Black Hammer, Light of the Abyss are just as good if not better than their VoG counterparts in my opinion. HoW brought two different "Raid Weapons", PvP and PvE. Both sections have some pretty amazing guns. Tho the PvE ones are harder to get because of their random perks.

Because shank burn is so much better than what exactly?

I clearly said the perks are hard to get for the weapons you want. Shank burn doesn't help much but can still be useful in certain situations.

If you need shankburn on a gun it's time to stop gaming ;)