This is just a supply and demand issue. You have abundant of supply of DPS with not enough demand for them. Think of yourself as a manufacturing plant that can supply 3 kinds of products: tank, healer and DPS. You know the demand for DPS is low, but for whatever reasons (they can be legit reasons, nothing is right or wrong here. You might like to play DPS, you might like a certain gear and how they look) you still want to enter the market and become a manufacturer for DPS. In this case, you will need to know that unless your product has a perk and can supply a niche market (extremely good player, in a good FC, well geared), then you should expect your product will be on the shelf longer than higher demanded commodities.

By asking the developers for help to change this, you are basically asking the government to intervene. In that sense, there are a lot more to consider as you are trying to shift the equilibrium.