@dostovel
– Overlays can be overlayed on anything (even on top of Eevee and Cycles), that’s it’s power, so yeah if you don’t want to see it in your viewport render then you have to turn it off manually.
Not all the icons in the Collections menu are visible at the same time unless you turn them On in the filters. Icons being hidden by default can be a big problem.
– Only for existing projects (from before these were hidden), I don’t foresee any problems in a fresh scene as you will adjust it to fit your needs while going along.
– the tv icon permanently hides it. If you use the eyeball and use alt+H to unhide something, the eyeball stuff comes back too. But if you use the tv icon it will stay hidden.
– for linking you will now select a ‘collection’ instead of a ‘group’. Creating a proxy still works the same. But I think @waylow can probably explain this a whole lot better than I 😊