That's where we disagree because, despite even numbers of players, the game isn't even for the simple reason that you as a defender also have to defend yourself against bots who are just as proficient in taking over a Garden/Graveyard as a human opponent. In other words, I am defending myself against a mixed bunch of 12+ opponents. I don't find that reasonable.
As I wrote initially (though not in that many words), I look upon multiplaying as a match between two teams where the success of a team is measured in terms of who is best able to position themselves, know the strengths and weaknesses of the opposing characters, use the ability best suited to their particular role in the game and read the way the game is developing. I just don't see bots as being part of that. PopCap seems to see it a bit my way in that they don't have bots in Mixed Mode (barring Gnome Bomb) where they perfectly well could have been part of the games in that game mode.
The bots have undoubtedly been included to give variation to the game, but if one is to have these things then at least not make it possible for them to take over a Garden/Graveyard. I could live with that.