I simmed an entire season with the Liverpool team.
Gerrard didn't decrease at all !
He grew 1 point at "Attack Positioning".
[AGE]
AGE_1 = 17 // Players inclusively less than this age
AGE_1_VAL = 5 // Percentage change for age
AGE_2 = 18
AGE_2_VAL = 5
AGE_3 = 19
AGE_3_VAL = 10
AGE_4 = 20
AGE_4_VAL = 20
AGE_5 = 21
AGE_5_VAL = 20
AGE_6 = 22
AGE_6_VAL = 20
AGE_7 = 23
AGE_7_VAL = 40
AGE_8 = 28
AGE_8_VAL = 3
AGE_9 = 29
AGE_9_VAL = 6
AGE_10 = 30
AGE_10_VAL = 9
AGE_11 = 31
AGE_11_VAL = 12
AGE_12 = 32
AGE_12_VAL = 15
AGE_13 = 33
AGE_13_VAL = 18
AGE_14 = 34
AGE_14_VAL = 21
AGE_15 = 35
AGE_15_VAL = 24
AGE_16 = 36
AGE_16_VAL = 27
AGE_17 = 37
AGE_17_VAL = 30
AGE_18 = 38
AGE_18_VAL = 33
AGE_19 = 39
AGE_19_VAL = 36
AGE_20 = 100
AGE_20_VAL = 39
These are the values that seem to work.
I'll try other teams also.
EDIT - Simmed an entire season with PSG.
Ibrahimovic didn't decrease at all.So did Maxwell and Alex.
Gerrard didn't decrease at all !
He grew 1 point at "Attack Positioning".
[AGE]
AGE_1 = 17 // Players inclusively less than this age
AGE_1_VAL = 5 // Percentage change for age
AGE_2 = 18
AGE_2_VAL = 5
AGE_3 = 19
AGE_3_VAL = 10
AGE_4 = 20
AGE_4_VAL = 20
AGE_5 = 21
AGE_5_VAL = 20
AGE_6 = 22
AGE_6_VAL = 20
AGE_7 = 23
AGE_7_VAL = 40
AGE_8 = 28
AGE_8_VAL = 3
AGE_9 = 29
AGE_9_VAL = 6
AGE_10 = 30
AGE_10_VAL = 9
AGE_11 = 31
AGE_11_VAL = 12
AGE_12 = 32
AGE_12_VAL = 15
AGE_13 = 33
AGE_13_VAL = 18
AGE_14 = 34
AGE_14_VAL = 21
AGE_15 = 35
AGE_15_VAL = 24
AGE_16 = 36
AGE_16_VAL = 27
AGE_17 = 37
AGE_17_VAL = 30
AGE_18 = 38
AGE_18_VAL = 33
AGE_19 = 39
AGE_19_VAL = 36
AGE_20 = 100
AGE_20_VAL = 39
These are the values that seem to work.
I'll try other teams also.
EDIT - Simmed an entire season with PSG.
Ibrahimovic didn't decrease at all.So did Maxwell and Alex.