Looks awesome and I would love to try it out. Unfortunately I work at a large company which has 'standardized' on Jira + other related tools. Now that the majority of work is being done through Jira, it would take a world ending event to move away, no matter how good of a product the alternative is.
In most scenarios I run into, "Unfortunately I work at a large company which has 'standardized' on Jira" translates into "Someone set up Jira poorly and now we dislike using it". The thing is that if you replace Jira with any tool you can imagine, the statement will hold true. Jira isn't inherently a better or worse tool than most others out there.
If you're at an org where it feels like Jira is holding you back, and you don't see the org changing tools in the near future, the best thing I can recommend is to bring in an external team to show the org how to clean it up.
Feel free to ping me if you need help (info in profile)