FRAM instead of Flash — what it changes on the BOM
The MSP430FR5732IPW: Program memory is 8 KB of FRAM.
24 MHz clock — timing budget for a low-power system
The 24 MHz CPU clock is the top end for this MSP430 FRAM family.
A 2 V minimum means the MCU stays alive through a brown-out that would reset a lower-voltage part.
ROHS3 compliant.
28-TSSOP — footprint and rework considerations
The 0.65 mm pitch is fine-pitch but within the capability of most reflow ovens; hand-soldering with a fine tip is possible but requires care to avoid bridging.