I think Trello's not being process-specific is an advantage. Every company I've worked at has had fairly different processes, so a tool that's tightly-coupled to one wouldn't work that well, just in my experience. It's also not clear to me that the coupling is essential. For example, what's the difference between a phase in Phaser and a column in Trello? They seem like the same thing, but with a very specific name.

You're also using a lot of terminology specific to your process in the pitch, which I don't understand, because I'm not familiar with your process.

The arcs seem like a nice idea, if I understand them (basically a way to filter tasks horizontally across all phases), but again I think you're usage of process-specific terminology is hampering your ability to pitch the feature.