If that were true, the simplest first step is to eliminate what, about 3/4 of the runes and signets from the game?
I mean, I LIKE the Rune of the Privateer, I wish it was optimal in SOME build, SOMEwhere. But it's not. I'd love them to take the high-effort road and give people an incentive for finding a use for some of the bizarre ones out there.
If they actually want to avoid people making bad choices, it's pretty much down to offering zerker, viper, their slightly-tougher, slightly-less-dps variants. And then some oddballs for capping crit or boon duration or something.