(Editor's note: We are unsure if there was a change in the patch number since the previous "184.108.40.20630b". We added the "c" to distinguish between these updates.)
As we previously mentioned, we will be bringing the Casual button back to the landing page today.
The Practice Mode option remains for Ranked, and the Casual button maps to the same mode. We have made some tweaks to match-making for this mode, primarily to help new players, and there is now a separate match-making rating for each mode. As always, we will continue to keep an eye on how this change goes, and please continue providing feedback!