A newcomer can't sell yet another me-too, even with evolutionary improvement. Instead the newcomer has to rethink and create from first principles if it is to have any chance in the market. Rethinks can't be scheduled; they take as long as they take. Ours has taken longer than I'd hoped, but adding resources like more people to the project would have just slowed us down, or forced us to market with a broken product.
The Mill rethink stage is over, and we now can have reasonable schedules and put in more resources; that's why we are going out for a significant funding round this year, our first over $10M.