I think a good way to fix this would be to reset the defense's spawn timer to 30 seconds instead of the 20 seconds it is currently.
If I remember correctly, 30 seconds was how it was setup for the defense in the original Enemy Territory.
Why do you think it needs fixed? I happen to like it the way it is, and haven't had nearly the trouble that those percentages would suggest.
When the defending team has larger numbers it skews those numbers, when the defending team has better players, or better communication, it skews those numbers. I've noticed that the matchmaking system seems to like to stack the defensive team for some reason as well, which is the only thing that needs fixed. The game shouldn't be tossing an extra man to the defending team.
The players are what balance the game and the only way to balance the players is to give one side a harder time and hope that draws the good players to prove they are good, instead of just the show offs who think they're leet because they out number the other team while they're defending.
All I have to say is, congratulations Sherlock. What will you find next, that milk tastes milky?
It's been fairly obvious from the beginning that maps favour defenders, as they usually do in most other games.
Though having played the game for nearly 3 weeks on PS3, I've only had Reactor fall to Resistance a few times... and I play it ALL the time as Security since it's my fav map, and I seldom lose.
That feels a bit unneccesary.