The release note says:
Alberich - mana recovery reduced 20%
This 20% is related to the “moderate amount of mana”, not to the overall mana recovery.
Before the change, it was:
slow mana: about 8.3% each turn
average mana: 10% each turn
fast mana: 12.5% each turn
(mainly a tile each turn)
The mana recovery reduction is related to these values.
So the reduction is:
Slow mana speed: 20% of 8.3% -> 1,6% each turn
Average mana speed: 20% of 10% -> 2% each turn
Fast mana recovery: 20% of 12.5% -> 2.5% each turn
The new values are:
slow mana: about 7% each turn
average mana: 8% each turn
fast mana: 10% each turn
I don’t have data about very fast speed, but it should be:
old value: about 14.3% each turn
reduction: about 2.8%
new value: about 11.5% each turn
I think the mana recovery is not the best Alberich’s quality.
I see just a minor change and for my point of view he is still an A+ hero.