I feel like day one clarification needs to be addressed when a new system that helps increase drop rates like this is put into place.
Clarifying what is affected by the new system as well as how many times a day the new system can offer the boost would be helpful.
I would also like the echo the sentiment about Arfus having an alternative way to get him such as tricky treat vendor given that we cannot cage/trade him. The same goes for the drakewatch scripts from all events.
As it stands now without further clarification on these new systems people are having to run through 5+ minute Horseman fights and 8-15 minute queues per horseman across 10+ characters thus wasting a lot of time in their day they could be doing something else if it was said day one that the pet and other rewards were boosted chance for the first run of the day only.