I've added PHYS_ATT_RATES (strength, endurance, etc), MENT_ATT_RATES (spacial awareness, memory, etc), and SKILL_RATES (all normal job-skills) with no rust values.
I didn't gen a new world after the changes, and it seems to have done the trick. I've not noticed any dwarves losing stats from the time of change onward (although I do have a LOT of dwarves now, so I might have missed it)
I left all the ranges at their default (so gaining skills/stats takes the same amount of time as usual).
[SKILL_RATES:100:NONE:NONE:NONE]
[PHYS_ATT_RATES:STRENGTH:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:TOUGHNESS:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:AGILITY:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:ENDURANCE:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:RECUPERATION:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:DISEASE_RESISTANCE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:FOCUS:500:NONE:NONE:NONE]
[MENT_ATT_RATES:CREATIVITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:PATIENCE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:MEMORY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:SPATIAL_SENSE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:EMPATHY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:MUSICALITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:ANALYTICAL_ABILITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:LINGUISTIC_ABILITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:INTUITION:500:NONE:NONE:NONE]
[MENT_ATT_RATES:WILLPOWER:500:NONE:NONE:NONE]
[MENT_ATT_RATES:SOCIAL_AWARENESS:500:NONE:NONE:NONE]
[MENT_ATT_RATES:KINESTHETIC_SENSE:500:NONE:NONE:NONE]
Give it a try if you want. I added them just above the MENT/PHYS_ATT_RANGE entries without problem. Can upload my whole creature_default if someone needs.
v0.31.08 graphical