Extra strategy line could be much more imbalanced than some stat boost and will not affect all gladiators equally. Rages very rarely use more than 3 strategies (especially the purely offensive ones), from what I see Slayers aren't very different so they won't benefit from additional strategy options that much. The issue is with the current coterie of Mk 1 HoLs which remained in Blood Gods and are not on a par with the incoming wave of Mk 2 HoLs, globally all new arrivals to Blood Gods are doomed to lose quite often until they get fully equipped and it's been like that for a long time.