Heatwave was the only that got screwed and he seems completely unphased by it. Hawkman's death is part of his character and was going to happen anyways. Plus he ended up in a better place since he's now not cursed to die and come back over and over again. Colds either not actually dead or is going to be resurrected. And (SPOILERS!) Ray was already shown with a new suit in the up coming crossover.
Yeah but most of the companions suffering was only temporary and weren't nearly as bad as what they went through. Rose lived a happy life with the 10th doctor copy she even reunited with a copy of her deceased father, Donna Noble lost her memory of her journeys but she got married and became filthy rich, amy pond/rory were trapped in the past but lived happy lives and raised a kid, clara Oswald died but that was after living for a few hundred years apparently, river song same thing, Martha jones walked away and ended up marrying mickey smith. The companions of the modern era didn't have it THAT bad. Danny got screwed, but his death had nothing to do with the doctor
What about the 200 ft Cyberman that destroyed part of Victrorian London? No issues there with time? Same with the T-rex running around?