relocate ports and net labels, change fonts, so underscores aren't hidden by wires and busses
Altium is useless when it comes to rendering the fonts on net labels and ports.
Could you change the font and the justification on the ports and nets, so names dont overlap edges of the ports wires and busses?
the net names are sometimes better when changing the connection point for middle edge of the box instead of the corner
it's easier to see the underscores.
NB: you can do very quickly using the altium find / select similar instances tool; it's a few mins.