Approval of the CMO/RD is needed for every single power given out, irregardless of alarm status.
Regarding the initial proposal: the reworks sound interesting, but even more RNG-based, since you now need to find out endless combinations of blocks instead of working on a list, which makes teamwork between genetecists even harder or up to impossible. It sounds a bit tedious, even if you make manipulating blocks easier and thus faster. As the system is now, two good genetecists need almost all of the two hours to finish all blocks. The chance of xray after 15 minutes is there, but not that high.