1. lower high temps,
2. warmer low temps,
3. slower decay to low temp,
4. much smoothed short duration flux.
I would guess you reduced ventilation (ie closed a top entrance), or added insulated top cover. This accounts for the less flashy pattern of changes (lower short duration signal). The changes in the RH curve is less important because RH is strongly temp dependent, same total volume of vapor will be lower RH at higher temps.
My guess is the post-intervention environment is better as showing greater stability. However, high temps have been cited as an anti-mite treatment. High temps may also help curing honey. Brood development is temp dependent.