Thanks for that insight. I thought there might have been a specific lore reason for this -- for example, you weren't concerned with flashbacks because this is an "origin story" for the Blades, so they don't technically have a past to flashback to. Another lore possibility was this: for heists, the Blades just weren't sufficiently experienced yet to be able to "foresee" their needs on a heist, or they just didn't have the ability yet to accurately "case a joint." When they gain experience, you can now say "hey, you're getting good at this, so let's say that you did case this place and set up some advantageous things...hence the flashback"