Previous frequencies of iron ore seemed to be quite generous, in this version (v48) it is really very low. This is as found in normal survival gameplay. A comparison coal stopped mining around 5x64, took many days (20s) of exploring in and through mountains to find seven iron ore in one grouping.
Has anyone else noticed a drop?
Vanilla:

Forge:

Roughly the same location. But this most definitely illustrates that this issue can not be reproduced. Iron ore is quite prevalent.
Most helpful comment
Vanilla:

Forge:

Roughly the same location. But this most definitely illustrates that this issue can not be reproduced. Iron ore is quite prevalent.