Rather than "Better GIT", it would make sense to position it as "better GIT backend" in my opinion. I get the desire to replace GIT bash but it might be harder to convince developers, who is your target audience.
Yes you might be 100% right. We were debating this a lot in the beginning. In the end we decided to build a separate VCS with Git sync, and simpler UI (for now at least - might change, depends on user feedback)