What happened to Adventure chapters beyond IV?

Hey guys,

So I just finished chapter IV of my Seasonal Journey only to find out that there are no more? Is there a reason for this?

I missed out on S6 due to work, but in S5 there were chapters that went beyond IV that provided and enhanced seasonal character boarder. It's a silly thing to chase above and beyond the pet/pennant and set gear, but it was something I enjoyed doing. It gave me a reason to continue playing the season and grind out better gear.

Every season I take my time completing the seasonal adventure. I don't rush straight to adventure mode in order to hit those grifts asap. Every night I had a reason to log on for an hour or so and grind. With the adventure ended so early into s6, there's nothing to chase and grind for :(.

What do you guys grind for once you have completed the seasonal chapters?