Just looked at the patch notes, they're pretty neat. I like the Dva barrier change, making that more flexible will be good not just for her survivability but for actually covering team mates. I'd love to see more advanced use of that. Zenyatta surviving more is good, don't know what the travel time will do but it'll be easier to kick butt with him.
Overtime changes look good but feel a bit unnecessary combined with the 1 hero limit in competitive. I liked the possibility of stacks even if they seem to have been abused with the current hero selection. I haven't watched a ton of competitive but it didn't seem like the limit did a lot to actually increase diversity, most every game turned out the same. It's only without the limit that I've actually seen a couple of games with what seemed like an off beat tactic. Of course if it produces more bad games than good ones it's in a weird spot, but I'm a bit sad about it still ... and for regular comp play it isn't as if regular groups will produce anything noteworthy.
I hope the Mercy changes make her a bit more interesting in the end. idk