Ability Mats in the Webstore Mystery Chest

I wish the webstore mystery chest awarded Mk1 and Mk2 ability mats sometimes.  Currently, it awards 20 Mk3 ability mats every day.  This creates an imbalance where players have an overabundance of Mk3 mats, but not enough Mk1 and Mk2.  Right now, I have twice as many Mk3 mats as the other two.  This problem has been made worse now that Omega Battles no longer award Mk1 and Mk2 mats.

Instead of awarding only Mk3 ability mats, I would like the webstore mystery chest to have a chance of awarding either Mk1, Mk2, or Mk3 ability mats.