I would very much like to be able to use Carpenters Doors and Carpenters Garage Doors with Carpenters Barriers - technically I can now, but they don't connect to the barriers at all, since the barriers stop in the center of the block, and further the Doors are on the front (or rear) edge of the block.

A Door that spans from the Left edge midpoint to the Right edge midpoint would be well placed to then have the Barrier connect to it.

I want double doors in my Barrier (and garage doors) because I'm stacking barriers to make serious bars, rather than just waist high fencing. A security fence is 3-4 blocks high in the real world, and doors in that fence are often full sized doors. A portcullis (aka a garage door) also makes sense with a medieval setting, and being able to use a Barrier on either side of the garage door looks cool. Or would, if it could connect to the door.

The easiest solution is to make barriers connect with doors, but because doors aren't meant for this purpose it won't necessarily look clean. I can jot down the tall door idea, but can't promise it will be added any time soon.