Wipe everything, New interface, new skins and complete new game play.

why lmao, your basicly asking for a brand new game...
There isnt a way of doing this.
Its just getting outdated, simple.
7 years old online game says it all.
Simple? Says it all? Hmm if you think for one second, age has nothing todo with it does it, every real gamer i know can't help but play on pong or a form of pong and that 36 years old.
To make it exciting you need imagination and reliable hardware. Mir seems boring to most people as most have moved on into the HD era and would rather play on their PS3 or 360. On the other hand, there are a huge amount of people that would rather stay put and still enjoy mir alot.
My belief is that due to alot of cruddy servers, unreliable hardware and also the let down of euro mir kind of pushed people away but there are some great servers about atm and they keep getting better and once the news of server owners hard work gets out, the popularity of mir will return to somewhere near the earlier days. *ahh good times*