There are some steps which has to happen prior what you're planning to do:
- As a very first an easy step please get the rid of fake characters which are only here to work for "free" and press the vote button periodically. The first one killing the economy and the latter is responsible for corruption on politics.
- Limit MP to switch only to D2-D4
- Drive the new players to airforce even with new missinons because in ground they are way behind so it doesn't make sense to spend gold on that...
- Consider to introduce new type of warfare (water mentioned previously)
- Lower the pay to win effect while keeping the income at least on the same level e.g. lower the price of packs (more ppl can buy) - but it's a bit tricky I admit that...
- Introduce some complexity at the level of normal players, strategy is only available on upper levels such as timing of wars, propose laws, etc.
- Vanish or refurbish unused parts of the game e.g. rocket factory, map, etc
- Move to mobile (very complicated to make this game fully work on app) but at least create a responsive site with unified look and feel
After all of these you can concentrate on how to achieve a small retention figures and increase the conversion rate from newbie to more advanced players. If you don't make a confortable nature for starters they are going to leave anyway because they feel the enormuos gap between them and average players (100k+ str, few factories, titan+ or CMS+ air rank).
A game reset is also an option but it would definitely upset many "high profile" players 
Edited by Seth82, 02 August 2017 - 06:48 AM.