Surely would of been easier (and fairer) to simply make stones harder to find rather than giving false hope/fun once a full set is found? No worries though - I AM sounding like a cry baby so I will go bury my character and get over it!
I see nothing unfair about it. The mechanics are the same for everyone.
BM was never meant to be D&D. It was never meant to be a "tactic" to use portal stones.