Diddy's broken but he's still not the most broken in Brawl, lol. He's either 3rd or 4th after MK, ICs and maybe Oli.
Link has a decent MU vs Diddy
for a low tier (<-important context here). Link's spam is a good anti-banana tactic because Link can often, at worst, trade hits with Diddy's camping and avoid the chains. Link's bombs can be thrown strait through banana forward throws and bombs cover landing and get Link off the ground. They make platform camping a good anti-banana tactic too. Diddy's main advantage on Link isn't bananas but simply out-classing Link in speed and recoveries. IMO it's a soft -2 or -1.5 for Link.
I can start moving my stuff on Thursday. I was worried I'd have to rent a storage shed, move my stuff there then move it all again. I'll be glad when this is over and I have my computer set up. This computer sucks and the keyboard is weird and smaller than I like.