Product development is a team sport. It takes an extreme amount of focus and a lot of communication and coordination between team members. Every person on your team, that also is assigned to some other project for part of their time, is adding significant delay to the ship date, measured likely in weeks or months.
Making a product 6–9x better right away is hard. But you don’t have to build something 6–9x better right away so long as you see the path to get there. You can build what could have the biggest impact first. Be two times better. Then, three times better. You can get to 6–9x better eventually.