1. Because impatient tanks and DPSes that don't realize healers need setup time (especially as an AST). Welcome to DF.
2. No excuse tbh. Seems to be common for new WHMs. I will throw up regens and shields ahead of certain situations assuming the rest of the party doesn't run around like an idiot making it a pointless cast.
3. No Swiftcast and keeping the rest of the party alive takes priority.