You can speed up app launching by turning off the optional exec-based spawning feature. Our camera app also has a Latency mode which recently became the default instead of Quality mode. Google and Apple camera apps essentially always use something resembling the Latency mode, but with lower JPEG quality by default.
What is the benefit of the "secure app spawning" toggle? Also, it would be great to be able to disable this for system apps or per-app (assuming it makes sense in the security model).