I wonder when "giving feedback to the developers in the format that they ask for" turned into "whining".

Regardless of that point, we have already been told very clearly that Trick Attack is being turned into a personal buff and Mug is going to be the new party buff, given that nothing was ever said about the timers on those abilities being changed, we can be certain that nothing will change in that regard, so everything we know so far is based on fact. Another fact that we know is that having the sole remaining 60s party buff stripped away will make everything more samey and boring. So these are all known facts so far.......what hypothesis are we making again? What shot in the dark are we taking?

Feedback is best given before a change is made, because once change is made, it would be easier to do nothing than to revert it.