Is it possible to have a new bidirectional port (that we can import, or export items into/out of) ? I have 2 reasons for this:

1: With ender io conduits, you can import/export with the same conduit.
2: When using separate ports, I still get waste (cyanite) in the import side, which for the sake of my OCD ... is very annoying :(

Its not only the ender io conduits, extra utilities can also do the same.

and, ist don't need to be a new port, just a setting on the old one.

I'm not sure I understand this request. Access ports are already bidirectional. You can insert fuel into one slot and remove waste from the other.

Then the problem is a misunderstanding: the port set to input should not output (its already an "issue"), and the output should not input. Make an option to be bi directional, and you no loger see "reactor outputs to the input" issues.

Ports set to "input" only receive output when the output port is too full. I don't see a logical reason why "output" ports shouldn't accept input. Also, the ports will operate bidirectionally if you only have one type of port on the reactor.