Fixers
Runspeed: Readjust runspeed curve in AO from the ground-up, decreasing overall speed and raising the maximum runspeed cap to allow Fixers a natural advantage from their runspeed-based toolset.
Runspeed Nanos: Revamp, allow for team amounts to be as good as single-target nanos.
HoTs: Potential team-based variants of existing HoTs. Potential additions of %-based HoTs across various level ranges.
Summon Stuff Lines: Improve ammunition-summoning line. Potentially replacing other summoning lines, as these are all worthless (yeah, that's right, I said it).
Roots/Snares: Duration decreased, faster casting, increased functionality in Shadowlands (goes for all professions).