For now it is the slowest class and quite boring (due to a reason below) lacking unique secondary gadgets - even though building obstacles is immediate and often saves you a life.
Here is what i suggest:
improve the class to be better at defending buildings -
add portative radars that will highlight enemies at line of sight in very close distance (e.g. 5 or 8 meters), only if supporter has exo helmet and also tags (spots) them in medium range (e.g. 20 meters)
LMGs are good, yeah, though i personally find supporter very weak inside the buildings. Most of LMGs in any setup will lose to SMGs or rifles due to very slow ads and slow movement. Though i do not claim supporter should be as equal as assault, it still should have a chance to win in close range shooting more often

yeah because you started turning this into a “my feelings got hurt” instead of an discussion about an idea