I played this map for the first time, and on expert as well as solo, and personally I would say a big problem with this map is the instant fail in the form of the final objective, it's essentially a cheap death, which would happen on all difficulties.
The final objective shows up when you claimed the final elemental tower, several waves spawn and they will march towards the shard, however the problem is that at no point in the game does it make you aware that you actually need to defend the shard, this resulted in me losing the game as my army was at the top left of the map and I of cours
