The RX/TX way naming of nets is inherited from a previous era, when there were a clear distinction between DCE and DTE, terminals and modems. Now that all electronics systems are like matryoshka dolls of smart-ish subsystems and that it's not always clear who is "in charge" of a serial communication, shouldn't we use different names altogether to put the old way of naming things to a final rest?

How about ASI/ASO for pins and ASAB/ASBA for nets:
- Asynchronous Serial In
- Asynchronous Serial Out
- Async Serial A to B
- Async Serial B to A

ASO --> ASAB -->ASI
ASI <-- ASBA <-- ASO

Short, unambiguous, we just have to pick arbitrarily who's A and who's B amongst the two sides of a given interface.
No "crossover point", over a jumper or a connector, where the TX net *has to* become the RX net for the communication to work.

Also, no collision with the recommended new terminology for SPI https://www.oshwa.org/a-resolution-to-redefine-spi-signal-names/