hey!
If ASDA is greater than TORA=TODA that means that the stopway is longer than the clearway.
Taking credit of a stopway allows higher V1 values, that reduces TODR and TORR therefor max operational take off weight is increased.
If stopway lenght is shortened, cause of work in progress, the weight increased will be not that big although it will be higher than when not taking credit of any SWY at all.
The above is true as long as you operated as a non balanced field criteria looking for an optimized take off weight. (most of operators do it).