Thanks a lot for the mention (Blossom co-founder here). We care a lot about keeping things simple while encouraging a great Kanban experience (including WIP limits, cycle time, …). I think of Blossom as the minimum viable Kanban experience with emphasis on the philosophy, not the 'features'.

Too many people building project management tools don't realize that features often just support anti-patterns and having more of them doesn't help.

I believe people building software tools should internalize that a huge part of providing a good solution is helping people get better at their craft & day to day on top of providing the software itself :)