Board Thread:Suggestions forum/@comment-26561382-20170318182339/@comment-26172435-20170319101704

Note that Mevans has indicated the mod team has considered to implement a more theme fitting alternative for redstone.

Furthermore, your suggestion may already be (partially) covered by these endorsed suggestions:

[Endorsed] Keys for gates

[Endorsed] Gates under Lock

And this one may be of interest too:

[Endorsed] Barred Gates

There are more endorsed suggestions on gates, but they are more like "Here's a texture for a gate for that faction that doesn't have faction gates yet.".