Hey, a lot of this is preference, and if you prefer a tool over another you should use it. personally I expect to keep a version of 2.79 around… I doubt all the addons for it will be updated. Tools are tools, if maya is better for you, maya is better.
Couple things though, just to dialog. For the pie menus, you don’t actually have click! Just hold down z, and twitch your mouse. Whether you like that more or less than pressing z, is preference again haha, though I’m excited that it might replace the alt-z/shift-z/whatever… can’t ever remember which one is which. Just wanted to point out you don’t have to click twice tho.
Not sure about pressing 2 in 2.79 to merge vertices… that sounds like it might have been a custom shortcut to begin with haha… it definitely doesn’t work in default 2.79. alt-m still works for merging regardless, which is the shortcut I always used… though, it being 2 is probably worth a remap, haha, 'cuz that’s always been an awkward shortcut.
As for tools, the shortcuts for tools still work the same… pressing i to inset faces (for example) activates the tool and closes it away the second you use it, the same it’s always been. There’s also the new tool on the sidebar for it, but I don’t see myself using that very much. That I’m 100% with you… it adds extra clicks and is slower… All of that functionality is also behind shortcuts. I’m sad to be loosing the normal shade smooth/flat on the sidebar though, I used that a bit.
as far as eevee goes, it’s 100% not for you haha. Marmoset is a better engine in every way, and eevee is reasonably shitty still. For arch-vis peeps though, and for animation/product/rendering, it’s super exciting to have a faux-realtime engine in-tool, which I feel like is super disruptive… afaik, only C4D has something comparable. that could be a game-changer, and we’re already seeing dudes like Jama Jurabaev take advantage of that.
also just wanted to say I saw the comments on your post over on facebook and they’re pretty brutal haha. it’s fair if you’re a bit frustrated, because they are not kind haha.