The only thing that will change as far as I know is that battery won't be glued anymore. You'll still have to open the phone with screw like you did before.
Nothing like that will change, not with this regulation, which already exempts any waterproof device like a waterproof phone. Per the article:
> The iPhone was already exempt from the removability rule under the original regulation, thanks to its battery cycle life and water resistance rating.
If you've ever swapped a battery in a phone you would know that there are special battery adhesive foils for DIY battery swaps that have a tab that lets you pull on the adhesive foil and thereby remove the the battery much more easily.
The issue is people thinking they need to use maximum power to RIP it out, damaging everything in the process.
You need a constant slow pull on the adhesive, which heats it a bit, causing it to release cleanly.