Same here. I thought the ash was for leveling up bonfires like in DkS2, then I realized only the Firelink Shrine Bonfire has a “bonfire level” display. Seems a bit redundant, which has me wondering if anyone has found that strengthening your estus flask has any other effect on the game?
Reached the area after the catacombs, but found I couldn’t enter due to lack of a key item. Went exploring in an area I forgot, hopefully on the path to said item. It led me to a new area that’s very active for co-op. I had a pretty good time helping other players and learning about the area while I did it. The area’s layout is quite dense with lots of hidden bits and may be my favorite area at least in terms of structure. One bonfire, with progressive shortcuts back to it. I really like this, I prefer the bonfires-as-level-hub compared to them just being checkpoints on a journey.