I am not one of the guys who is throwing with money, so maybe you have already calculated everything and found out that you will earn more if only some people buy overpriced stuff instead of many people buying fair priced stuff.
But here is my opinion:
-
New pricing of mercs?
I think merc’s would look much more purchaseable when the acutal prices will get halfed. So 5 € for all advanced mercs. That sounds fair. -
Add possibility to “buy” the game?
Additionally I would add the possibility to let people “buy” this game. So for 30-40 € for example they will unlock all mercs at the moment available and also everyone which will come out.
So their earned credits can be spend on loadout cards.
- Add possibility to buy a favourated card without the need of buying uncountable cases
Next I am missing the feature to buy a special loadout card like its possible in LoL for skins and not just cases with random content. I hate gamling.
For example Silver cards for 3 €, Gold for 6 € and Cobald and any other skin cards which will arrive for 10 €.
If I fall in love to a merc in DB I think I could later on buy a special skin for some €uro.
- special offers
Hopefully you will also add later some discount days to motivate me to buy.
I think everything I buyed in LoL I did this when it had a reduced price. Same thing in steam. When I think about I by once in a blue moon things related to pc games full priced, and I am not the only one 
So take advantage of it and mislead me. Suddenly I invested my first money into this game 
… but not with the acutal price modell and the possibilities what I can buy.