I have followed up on Tiltskillet's work with the following (Kills via ability, no drop related mods/arcanes except for an unranked vacuum because mags passive was/is broken):
Arid Butcher 580kills (460 for ammo, started counting it late)
Health orbs: 83 (14.31%)
Energy orbs: 100 (17.24%)
Primary ammo: 48 (10.43%)
Secondary ammo: 41 (8.91%)
Arid Lancer 580 Kills
Health orbs: 90 (15.51%)
Energy orbs: 78 (13.44)
Primary ammo: 58 (10.00%)
Secondary ammo: 65 (11.20%)
Bombard 580 Kills
Health orbs: 89 (15.34%)
Energy orbs: 88 (15.17%)
Primary ammo: 57 (9.87%)
Secondary ammo: 63 (10.86%)
Heavy ammo: zero (see notes below)
Total:
Health: 262/1740 15.06%
Energy: 266/1740 15.29%
Primary: 163/1620 10.06%
Secondary: 169/1620 10.43%
While my money is on the type difference on the orb drops being gone and a overall 15/15/10/10 being the new paradigm I noticed two things that bug me.
-First my Mag's passive was down in the simulicrum. I have not used her since the change to her passive so I don't know if this is general break or something I did.
-Next was heavy ammo: I did not pull an arch gun until after the bombard waves to avoid weird drops or confusion between the yellow heavy and orange secondary. After I then decided to pull the archgun and kill a hundred in a quick check of the wiki advertised 5%. Zero heavy ammo dropped. I then started doing waves of all the listed units that drop them. Still no heavy ammo. Started varying the level from 1 to 35 to 90, still nothing. I am now well over 1k "Heavy unit" kills with no heavy ammo drops. Am I locked into one unit type somehow or did they just remove heavy ammo when they buffed archguns? I certainly seem to run out of archgun ammo more recently but I haven't noticed if I am actually picking up zero ammo.
Edit: While still unable to make heavy ammo spawn in the simulicrum I did confirm they exist in survival for me.