They didn't mess anything up. After every single patch/update there are a flood of players claiming Bungie changed something and that is the reason why they have been getting kicked.
Weasel usually means packet loss (suffered it from a while myself). Destiny requires a very stable connection, which is probably why the issues only occur while Destiny is active.
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Same Problems here, funny thing for me at least, i'm playing an additional char on PSN but there i never messed up with these errors .. better to say within 30 playing hours i didn't face a single network issue. When starting Destiny on xbox one it usually starts with 3-4 weasel peasel measel errors ..yea PSN is offline when playing on xbox just you know..also when trying to play a raid and use gamechat or party etc there are network issues everytime as well .. not on PSN .. i'm a addicted xbox player but if these issues won't soon it will reduce the gaming fun massive.. my 2 cents .. (english is my mother tongue, but hopefully u can understand me) Again i would love to stay on xbox, as almost all my friends are playing there, but with these embrassing network/connection issues every single time i want to play, i begin to thin my patience won't last much longer.