Actually the change says "No longer bypasses Junkrat's Steel Trap", you cannot dash through the trap any more, you have to stop and hit it 4 times or go another way. So previously if with your eagle eyes you could spot the trap in the middle of a team fight, now you can't dash over it, you can't jump over it, you might be able to kill it if you could somehow get 4 clear shots at it...
Uh? The double-jump-after-climb nerf doesn't affect his combat mobility, or are you double jumping wall running then double jumping DURING COMBAT? Come on, during combat everyone either sticks to the deck so they can evade better, or jump to dodge AoE, no one spams double jump into wall run into double jump... I never even saw any top Genjis do that (eg Shadder, Surefour, Seagul, etc). Tbh I think it would be more harmful than beneficial since you will have to fall so far afterwards... Can you honestly say this is something you do? The only thing I heard people cry about is that his swift strike can refresh on elim. For some reason people think this is worse than Tracer for no reason... Maybe if they gave Genji a sweet ass and made him not Jap then people wouldn't complain so much.
Yes Genji can still flank, but his mobility is serverly limited. Most of the short cuts require you to jump jump climb and then jump, which he can't do now. He will have to burn a swift strike. As you know, having swift strike on cooldown sucks since that is both your escape and your burst damage ability. Having to burn it to get close to combat means that you are going to be sitting around a lot more waiting for cooldown, and if you happen to take a shortcut and someone is there? gg you die. It's unnecessarily punishing for something basic like moving around - Tracer can save up to 3 charges (with 2 second cooldown), Reaper can wraith form to safety and even grab health, but Genji typically just dies if he is caught without his escape and in a bad position... He's already exceedingly punishing, and I get that it's supposed to raise the skill ceiling, but it's kind of absurd at this point.
Plus it's really cancer to try and play on PTR. Give it a shot and try and jump, climb a wall, then jump. You can do it, but you have to hold space after the first jump. Is this a good change? No way in hell, it's just 100% cancer. No one wants to jump facing away from walls and holding space, it's stupid. Even if they had a separate button for wall climb (which is also stupid...) it's still going to be a pain in the ass compared to just climbing the wall normally.