The argument can be made that it makes legendary weapons less legendary, but barring the few levels they're viable for, they end up being bag space afterwards. There is literally no reason to use an old legendary weapon after you level past the tier of gear it is contained in, so how does that make it legendary?
You can currently go back and farm every legendary, it might be difficult, but it's still available, so you can't argue that it's because of the rarity.
If the reasoning is that everyone will be running around with one, once again, they're all obtainable, and for those who do obtain them, they sit in SW/Org and that's it. What's the difference between sitting in Org and being able to use your old Legendary during a raid?
If the reasoning is that you can reskin your legendary to make it something else, say Dragonwrath to Anathema so that you look less threatening, why not retain restriction to reskinning the legendary but allow other weapons to use the skin.
Just curious about this, I'd hoped for a long time to be able to use Thori'dal again, and this seemed like it was finally the opportunity, and then we were told otherwise.
Kaivax posted the following.
Legendaries will always be identifiable on sight.
My argument is that a legendary weapon will be banked after the tiers of gear it's used in. So the status of the weapon as a symbol of power goes away (Having a legendary at the level it's meant for is seen as a sign of status.) Having Thunderfury at level 85 is not. In fact, using old legendaries for any current content is asking to be kicked.
Once again, why relegate the old legendary weapons to shelf status?