I usually good with 1% house edge and for me 3% is high, I am happy to test and try your gambling site but not with house edge that is way more higher than the other game and some third party games in other casinos may I ask if there is a way you could lower it to make it more interesting to players?
If we look at the FAQ page about the dice game, the house edge of this new game is 1% only as per below screenshot:

I'm not sure where did you get the information that the house edge is 3% and I also do not know how to calculate the house edge.
Perhaps we need someone who have better knowledge about how to calculate house edge.