Whether you agree with my logic or not stems off from the initial point I made. The gear was never designed to be around forever. And making a comparison between content between dlc and a full on expansion is a little misguided. I know most people don't know that there is a legitimate difference between the two but it's difficult to make an accurate assessment of what is being brought to the table in terms of content. Simply put dlc or add-ons do exactly that, the add on to what is available without necessarily altering game mechanisms which is what we see with like the call of duty franchise or most console games where they put in a few maps and maybe a few missions and weapons. An expansion is basically a reimagining of the current content and building up from that. You'll see those in mmo's or even a game like warframe where they not only add on content to the game but they add in or alter game mechanics as a whole which is what is happening with ttk. I've said it before and I'll say it again, I don't necessarily agree with what they're doing but I do have a general understanding of why the old gear is being left behind. Bottom line is the old gear doesn't fit in line with the new direction destiny is going in. Old gear doesn't have the same perks and abilities the new gear has. The new weapons for the most part are being classified into individual themes based off vendors the old aren't. Everything they are bringing into the fold when it comes to gear with this expansion is not available on the old gear which is what I mean by it wasn't designed to last the duration of the game. Even if they did bring the gear to the new damage and armor levels they still wouldn't have the same capabilities that the new gear has so it's being left behind. It's that simple.