3 Simple suggestions for one of my favourite machines.
1: Air burst proximity ammo on the prime as standard, would prefer this hugely over increased damage against Aeros as it is now.
2. A historical gunsight on all but the LRM machine, like todays figther jets use to indicate the lead required on a locked-on target (could work like the old XWing v Tie fighters reticule turning red when the correct lead was achieved). The Airboys got their bombing pipper so it seems only fair the anti-airboys get theirs IMHO.
3. A variant with 2 Light Gauss for 20K for anti-VTOL work (they jump around so much they are next to impossible to down with any of the partisan variants available), or alternatively a variant with 4ERLarge as there's no real laser tank in the game IIRC.
As stated it's one of my favourite machines (have spent entire matches in nothing else) but it's severely at a loss in adequately completing it's primary AA mission, and spray'n'pray just doesn't really cut it in the 31st century and with (particularily VTOLs) the flyboys wonderous lag shield you often find that after a dozen rounds finding the sweet spot he's warped somewhere else completely

On a side note the twin mguns on the new harasser variant actually hit more reliably than the Parti Primes quad ACs do, so somethings seriously wrong there!
The situation as it currently stands reminds me of MW3 lag shooting combat, and surely that just is not good enough for MWLL?