Yup, if I understand the wording, tournament rules will apply : crown lvl 9, leg lvl1, epic lvl 4, rare lvl 7 and common lvl 9 with 3 min overtime.
I need to lvl up my rares and epics to get ready for the tournament rules. I've only been requesting commons so they're overleveled (lvl 11), while I don't have the cards to lvl any rares up to 7. Similarly, I can only get golem and pekka to lvl 4.
The changes to hog really seem to have lowered his usage. In my last ten games only one opponent used hog. Miner decks seem to be the most common now, at least around 3500 trophy level.