@figle: I'm not sure we want to change this to include even best bits of PBEM as this site is very good at what it is. I think the major issues are with NMR's and CD's that can completely unbalance a game, as well as sometimes it's frustrating when people don't communicate (although I've met this in PBEM too unbelievably).
Whether NMR's and CD's can be improved while keeping games flowing isn't easy: I'd suggest that CD's can only be taken over by players with +100 points (say) to ensure they're not picked up and dropped by new players. To encourage better players to pick up CD's we'd have to eliminate the cost to do so (and the winnings? perhaps pay 1/2 of the initial stake that the original player put in as a compensation, but not provide any winnings - so that it's not only the very best CD positions that are taken up). Another addition might be the chance to simply CANCEL or ANNUL a game if a player goes into CD (I've had a game where the biggest two countries were cheating, got banned and then were taken over. Fortunately the new players were honourable enough to draw the game since the cheating completely ruined the balance, but a vote to annul the game would be nice in these situations).
Perhaps point penalties for NMR's?
Another suggestion to minimize CD's and NMR's would be a "mandatory" beginners' game when you first sign up - I don't know what the rate of signing up is and whether this would be feasible. Perhaps instead of that, cap new accounts ability to play in larger-pot games (e.g. can only pay 5 points/game until have completed one/five games). Often we see people spend all of their points to join a 700-pot game, either unknowingly or knowing they'll get their 100 points back if they lose. Sure I could join games which cost +100 points to play, but I'm thinking of others too.
Another improvement I'd like is either not to count CD's in stats or to count them separately. Similarly, I think at the moment anyone who goes CD and is taken over doesn't have that appear on his profile? That ought to be changed: "name and shame".
As for communication, I'd love to see a "proper" forum (not to flog a dead horse) simply because this one frustrates the **** out of me. I think it would encourage players to be part of the community rather than just play games, and therefore hopefully encourage more communication in-game. I think it'd be easier to organize games of like-minded players, to have post-game statements, public-press games, discussions on games (e.g. the School of War) if we had a "normal" forum like the developers one, but I know that there are problems of integration and that some people like the forum as it is. Plus with stickies etc. league organizing/recruiting should be easier.
Okay, wow, that's a lot more than I intended to write at the start! But that's my tuppence.