Better ore distribution in Asteroid clusters
Currently, asteroid clusters in a standard game have a narrow distribution of ore types, with at most two types of ore per cluster (e.g. Nickel and Magnesium) even if there are several asteroids present in the cluster. Combined with the average distance between asteroid clusters and the limited ore detector ranges, it is very difficult to find all the ores you need. A better way would be to have a more varied distribution of ores per asteroid cluster.
In the public test I ran out of ice to power my hydrogen tank before I found a single asteroid with ice in it. That could just be bad luck but I checked at least 10 clusters, Ice should definitely be more common too.