You are correct. I want Rez to stay in her kit either as a multi-charge rez or in the form of Mass Rez + Tweaks
And I would prefer the later, where Ressurect returns as her Ultimate + Tweaks. I’ve made a thread that explains my idea for a rework of her kit that includes these changes, found here.
I agree with you completely.
Well, we can’t speak for all Mercy mains can we? We don’t exactly know whether or not Mercy mains would like her to be made into a more skilled hero or if they like her to remain as a one star. How that would be done is up for debate, but speaking for myself and some fellow Mercy mains that I’ve discussed this with, a lot of us wouldn’t mind if her skill floor was raised, if that made her more engaging, rewarding, and impactful to play. Personally, I think I would love her kit to have more depth than it currently has now. 
You are entitled to like Mercy as she is now. And your reasons given are completely valid ones. For me, playing her since the beginning, she was always the most reliable and mobile healer, so that’s kind of what I expect from playing her, like how with Lucio, you expect him to wallride or with Ana, you expect her to have good burst healing. That comes with the hero’s design overall, and I still like those aspects of her, and she wouldn’t be my most played hero if that wasn’t the case. Besides that though, her ultimate and Rez on E are the two things that I would like to see improved.
Her ultimate doesn’t do it for me personally, since it feels to me like a exaggerated Torb Overload ability (which is on E). That aspect of homogeneity in an ability that is supposed to be an Ultimate, is perhaps what some people are in love with. For me, playing her with an ultimate that was so much more powerful, I’m not all that impressed with it. I think it would work a lot better as an E ability, not as her ultimate.
Rez on E just feels clunky and undeserved for me. I don’t like the slowdown, and I don’t like the timer mechanic. Both go completely against her smooth, mobile gameplay in my eyes, where you actually had to work for a rez and you earned it, instead of having it given to you every 30 seconds. I like the feeling of earning a powerful ability like a rez, and I like how it had the potential to punish reckless ult usage and ult spam - it’s original purpose. I believe with how powerful resurrect is, it doesn’t belong on E, but on Q, or tied to be exclusively in her ultimate. Freeing up the power distribution of the rest of her kit.
Ignoring the Ad Hominem remark about usernames, you are entitled to believe the contrary, but I believe Mass Rez is most definitely coming back, in some shape or form, and I believe that without it, this game is going to continue to struggle with things like power creep, ultimate spam, and comps like GOATS dominating the game. With other reverts to her kit, such as her base healing, her voice lines, and in Valkyrie’s revert back from 50 to 60 hp/s, I’m confident that there is a lot of potential for them to revert Ressurect as well, and will continue fighting for and voicing my opinions on it, no matter how long it takes.
And you are of course fine to believe that about Mercy 2.0. For me, I believe the issue is not that Mass Rez would become a single rez. I believe the issue was Mass Rez having invincibility, it being instant, going through walls and floors, and Mercy having Mass Rez ready even if she was killed before it completed. Those issues combined made it incredibly difficult to counter if the enemy team wasn’t prepared, and I think modern fixes to her Ultimate where it has LOS, a 30% damage reduction instead of invincibility, a 1.25s cast time instead of a 1.75s cast with a slow, and the ability for her to cancel her ultimate either herself (to allow escape) or when she’s killed before the cast, prevents her from having again after spawning.
All of these tweaks is what I believe will make her ultimate not only balanced, but also more rewarding, engaging, and impactful to play versus Rez on E. There’s many other solutions on how Mercy can be Truly Fair, Fun, and Balanced, but for myself, that is what I would love to see in her kit.
And I think she will get major changes, and more reverts, and in turn, hope you’d enjoy still playing her if or when they do happen. Besides Rez on E and Valkyrie I already enjoy playing my favorite hero, and whether they decide to revert her some more, rework her again, or add some minor buffs, I am excited to see what they plan to do to improve her in the future. Here’s hoping!
~Sincerely Yours xoxo,
a Lover of True, Fair, and Fun Balance.
xavvypls 