The recent batch of Jira clones all seem to be missing a feature that was one of the few things that made me choose Jira in the first place: BPM style workflows with phase-specific data capture and actions / transitions.
Trello / Kanban / Agile style 'project management', gnatt / burndown charts and velocity etc. are nice for day to day views for people working at the coal-face and the never-ending war of attrition.
But a lot of the competing tools are not as elegant when it comes to modeling interlinked cross-team processes end-to-end.