I just started playing the map. I can already see that a lot of effort was put into it, which is great. But I noticed a huge drawback: the computer takes a very long time to make its moves. It's really annoying.
As far as I understand, this is a fairly standard situation for Heroes 5. I personally find it difficult to play the fifth game after playing the third, where the computer moves are super fast. I don't think the problem is with my map, or that I can do anything to fix it. I can only recommend a mod to speed up the AI's turn; I found it somewhere on this site, I think.