My experience was a bit different from what others have posted here. I felt that some DPS, like Dogface, became disproportionately powerful in this brawl with no natural counters other than similar DPS comps.
In regular PVP they are commonly referred to as “glass cannons” - high damage, low health. The low health is meant to counter their high damage output. In this brawl, they lost their normal disadvantage and just became “cannons”. Tanky heros/teams were not able to kill DPS before heals landed. Since healing was also nerfed, certain DPS heroes could easily outpace heals, whereas the same could not be said for tanks.
I understand that characters with very low health to begin with, like Clyde, didn’t get a very big boost, but I saw many Dogfaces out there with over 300K health in this brawl. Even with the added health he is able to take down many heroes, even some tanks, in a single clip with his bronze and silver ability, and thanks to the added health that he receives, the normal counter - killing him quick - didn’t work.
The most difficult teams for me to defeat were ones with several tanky healers like Gammond and Heimlock with several super glass cannons like Dogface. If these changes were to become permanent, I have very little doubt that this would become the new meta.
It may be the case that DPS is currently doing too much damage, but increasing health coupled with decreasing healing, only makes the DPS stronger, imo, because it takes away 2 of their natural counters/disadvantages.