trust me, last night I study this case for hours, on and off the server many times, it has no even single change.
I creat a RuneKnight character, make it level123, joblv29, no equipments, AGI87+2, DEX52+4, use awakening potion, ASPD is 174;
with same status, in iRO I get 181ASPD.
so like you said, once i disable #define RENEWAL_ASPD, and restart my server, this character's ASPD supposed to change to 181 right? well, it doesn't, its still 174.