Hypno was never particularly useful. I was never happy with them except as prestigers. Before the CP change, after the CP change, after Gen 2... in all cases they were lackluster.
It's not like they're particularly rare or anything, as a species, and good IV's won't make an ineffective species good.
Golem isn't that good either - it's got niche uses, but marginal CP and crap typing really limits it. I don't think this changed during any of the rebalances either? (though I forget if it lost or gained CP in that rebalance)
In summary, IMO, they weren't very good to begin with.