Heroes 5.5 WarGame Edition - Tactical Edition.

If, in the case of Wingael, the reason for strengthening the specialization is clear to me (reducing speeds practically eliminated the rush tactic, as a result of which Wingael ceased to be so formidable), then in the case of "Running Like the Wind," it is not clear to me – what is the reason for strengthening this specialization (I assume that this was done against the background of changes to the "Haste" spell itself)?

There are 3 reasons:

1) Strengthening specializations in general (the developers focused on creatures, as the strength of the Attack and Defense characteristics has doubled).

2) Reducing the area of effect of the spell (from a mass effect to an area of 4x4).

3) Reducing the duration of the spell (0.25 x (Magic + 1) instead of Magic).

The original specialization at level 20 gave +60% initiative instead of +40% (a 1.5x increase).
The new specialization at level 10 gives +150% initiative instead of +100% (the same 1.5x increase).

The original creature specializations at level 20 gave +10/+10 to stats.
The new creature specializations at level 10 give +5/+5 to the new stats, which, when translated into the old stats, gives the same +10/+10.