You're assuming that more data leads to better decisions. That only holds true if the data is analyzed correctly and one views it without much bias, and considering incomplete data previously was used to justify killings then I'm not sure more data will help.
I'd also posit that expanding the US surveillance capabilities now to better the current situation might also lead to a worse future if we manage to fix the underlying problems you numbered.
I'd also posit that expanding the US surveillance capabilities now to better the current situation might also lead to a worse future if we manage to fix the underlying problems you numbered.