tl;dr: An action-oriented manga that manages to bring together the extended stories of an interesting and decent sized cast into a single cohesive narrative. 

Sengoku Youku is a shounen battle manga, though one that excels more in plot and characterization than the actual action. The plot isn't that complex or convoluted really at all, but it does involve a lot of intermixed stories of a lot of characters. These stories aren't all that complicated, but it still feels somewhat impressive how they all tie together into what feels like a single well told story that is consistent from beginning to end, not just in terms of the plot itself, but also in terms of themes and tone.

Furthermore, while they are simple, they do help to highlight a lot of characters and develop their motivations and such. Ultimately, it felt like only a couple of the characters, Senyu and Shinsuke, got fully fleshed out character arcs where they experience major character growth, wherein while growth does occur in others it's not built up as well. Still, despite that, many of the less fleshed out characters were interesting and likable as well and it was interesting to watch where their stories led.

Relationship development similarly was a mixed bag with some feeling well built up but others, including most of the romantic relationships, feeling underdeveloped. Still, within the context of the plot the development was generally enough for what it was needed for in terms of having the reader have enough investment in certain characters and bonds for moments to have impact. This is especially true in terms of the ending which ends up being heavily built on that investment.

The ending overall was interesting in that over the course of a pretty extensive epilogue it wraps up pretty much everything, and seems to go farther than I expected in terms of this. By that I don't mean that it forced things, the way everything proceeded felt very natural, but rather it decided to provide endings to things I didn't expect to get endings. When it started proceeding in this direction, I was very skeptical, but by the end of the ending I felt that it had managed to do a good job with it.