Until the season 4 update, Release Notes for the current patch were listed in the launcher. It was nice. It was easy to access, and, most importantly, it was right there.
Since then, the release notes have been replaced with a gargantuan ad for the C-Store. That's okay, I suppose... but, I for one would much rather still be able to peruse the release notes from the launcher.
The best way to do this would be to make it so that the current link to the release notes at the top of the launcher window opens them in the old style.... as opposed to forcing us to open up a new browser window and do extraneous navigation in said window in order to read them. (If I wanted to look at the notes on the site, I'd just come here manually instead of clicking your link)