Well, thats a pretty tall order to build the ideal Bullpup with no issues, that's better than the current available crop...
To be on par with the top line Bullpups is going to take a lot of work, innovation and skill.
To beat the top line Bullpups you'd need to create a trigger group on par with the sweet state of the art trigger on the Taipan, a side lever like the Vulcan, the weight and shot capacity of the Wildcat with the power of a Taipan long and beautiful stocks like the Cricket. And thats just the start of a long list of "ideal" features needed to be the ideal Bullpup imo...
Not saying it can't be done, just that Scandinavia, and the Eastern European countries have been perfecting their Air Rifles for a long time and imo have great crop in 2020 to choose from....
jmo