Replaced the front differential mounts/brackets today. Overall not a bad/hard job. Driver side mount was a bit of a pain to get out. That's probably what consumed the most time because since I was doing it by myself, I had to constantly keep getting up from under the vehicle to raise/lower the jack supporting the diff, get back under, twist, pull, pry to get the bracket to move some more, wash, rinse, repeat. A lift or 2nd person would have made this a ton easier.
Old bushings were definitely shot. I could move them by hand, visible cracks, etc.
You can just replace the bushings themselves instead of the entire mount/bracket, but you have to press them out/in, so for not much more money you can just get the entire bracket which in my opinion makes it much easier/quicker job.
The clunk on aggressive downshifts I was having seems to be gone now. I also use to get some weird creaking noises when slowing to a stop then putting it in reverse to backup into a parking spot or something. I'm guessing because the front diff was moving all around with the worn bushings.