Some new stuff got revealed, including the actual Archimonde class trinkets.
These numbers are PTR and might be still way off - keep that in mind
But currently the BM bonus looks bonkers. 30 seconds more BW - this means 4 times more uptime on Bestial Wrath on your pet + even bigger damage bonus to your pet. As BM majority of your damage comes from the pet so that trinket is going to increase your DPS by a gigantic percentage.
Hopefully this gets put in line with other specs because currently it's just broken good.
1) It's not as good as you think, according to early PTR sims, the trinket(norm version) gives 2k less DPS than Mythic BHOTM or Normal Malicious Cencser(multi passive, agi proc). It's actually complete trash. Early sims