Have to agree. I attacked a Alpha and got level 1 and 2 items. Next day attacked a level 4 and got 2 simple things.
This is why everyone tends to attack Lv1, Lv6, or Alpha Assailants. Why bother with the others when you are guaranteed to get a level 1 item by attacking a level 1 A&A (Assailant and Apostate). It may take slightly longer but you know what you get by killing Lv1's.
If the programmers want to see and even removal of all A&A's they will have to adjust this so you will get 2nd level items by attacking a 2nd level A&A.
If they are concerned then make it like the following:
Level - Items
Lv1 = Lv1, Lv2 (1%)
Lv2 = Lv1 (18%), Lv2 (80%), Lv3 (2%)
Lv3 = Lv2 (17%), Lv3 (80%), Lv4 (3%)
Lv4 = Lv3 (16%), Lv4 (80%), Lv3 (4%)
Lv5 = Lv4 (15%), Lv5 (80%), Lv3 (5%)
Lv6 = Lv5 (15%), Lv6 (80%), Item Reward (5%)
Alpha = Lv5(10%), Lv6 (85%), Item Reward (5%)
Item rewards can include Glittering Dust, Hero Crystals, Sulfurum, Pearls, Empire Ignots, A Candle
If you want to make it interesting place the following items with the following levels:
Level = Item
Lv1 = The smallest stamina/faith boost or 1 day VIP
Lv2 = Royal Edicts x10
Lv3 = Drafts x10
Lv4 = Grants x?
Lv5 = Platinum x?
Lv6 = Hero Crystals, Candles x5
Alpha = Glittering Dust, Sulfurum, Empire Ingots, or Pearls x10
This will change the % to something like this:
Lv1 = Lv1(95%), Lv2 (1%) , Item (9%)
Lv2 = Lv1 (10%), Lv2 (80%), Lv3 (2%) , Item (8%)
Lv3 = Lv2 (10%), Lv3 (80%), Lv4 (3%) , Item (7%)
Lv4 = Lv3 (10%), Lv4 (80%), Lv3 (4%) , Item (6%)
Lv5 = Lv4 (10%), Lv5 (80%), Lv3 (5%) , Item (5%)
Lv6 = Lv5 (10%), Lv6 (80%), Item Reward (10%)
Alpha = Lv5(5%), Lv6 (85%), Item Reward (10%)
This might make hunting different assailants more even.