is renown on a catchup system? can i start farming rep now and not be suuuper behind?
To be honest, I don’t really know if there is a catch-up system for renown in 11.2, but you’re not missing out on much. The only thing of any real significance is Renown Rank 18, where you get the permanent Augment Rune.
So, you might as well get started now and progress through the ranks. If they do add a catch-up system later, you’ll already be ahead. But I don’t think they had one in previous patches—then again, I can’t honestly remember, as it’s been a while and I never really paid much attention to it.
No, but Blizz has introduced the “Winds of Mysterious Fortune” event a few times that doubles rep.
For older expansions you can farm rep with Timewalking.
It doesn’t take long to hit Renown caps, I habitually get paragon troves off them for the 1500 crystals the troves give. Don’t forget to grab a contract for the faction you want maxed out.