Many of them would need to modify the MCU symbol pins to outputs, which isn't very handy either. That's a common problem. Perhaps one could introduce a special symbol, similar to a power-flag, which declares a driver to that net (virtual symbol with a single "output" pin).
ok1hra
commented
5 years ago
The use of the power-flag should fix many of them. We at Team14 also use passives with a dedicated direction, to give the ERC more chances to detect errors. Once I wrote an article about that: http://www.zeilhofer.co.at/wiki/doku.php?id=resistors_and_void-pointers
Many of them would need to modify the MCU symbol pins to outputs, which isn't very handy either. That's a common problem. Perhaps one could introduce a special symbol, similar to a power-flag, which declares a driver to that net (virtual symbol with a single "output" pin).