Here are a couple suggestions I have for more advanced m7 players ( "<" meaning basically required in current high level m7):
Timers/tick timers hud:
storm
storm crushed
storm death time (for the first death for py speed) <
relic time
out of bounds death tick hud
party finder:
pb and secret average display in party finder <
Terminals:
stage complete text
Reminders:
titles that can be displayed when certain text is said or at certain tick times <
General dungeons:
a way (such as customization for individual items) to differentiate between similar weapons such as swarm or chimeria hyperions or duplex and soul-eater terminators <
Leap messages
Leap counter (counts how many players have leaped to you through leap messages)