An interesting idea popped up into my head with the release of Eve:Echoes. I am thinking of something you should look into that could massively benefit the game, and ultimately the company and solve its retention rates.
Since Echoes will provide a “fresh start” on skill points you can monitor it. I suggest creating a questionnaire at the start of the sign up process for these accounts and try pooling data to see how many people are going to the mobile app for the reason of “a fresh start”. Be sure to include data for "if they are coming back to eve after longer duration breaks (>= 2 years). It may also benefit you to pool data on if people heard of the game and knew about it but did not play because of the massive lead in skill points.
If this is in fact one of the major draws to the game, or people are coming to the mobile app for this reason, you will have pulled data to validate my positions on the reductions of longer duration skill training.
Many times in the past on the forums i have posted a position that a large amount of the retention rate is loss due to the long tracks of time it will take to get into a new ship, and that with faster progression you will increase both the retention rate values, and competition rates. with faster training alliances mandating new ship types with ship builds may move from its unreasonable position to a more acceptable one.
If these validations are made to be true, you could start investing a massive reduction in the Level 4-5 skill training times. Alternatively, you may look into another server, where people can start fresh. This will also benefit income rates of the game as it will result in an increase of sales for boosters on the new servers.