Here's my take on it:
1) Offensively, you MUST use troops of the appropriate color in order to get full score (8820, when your statues give you an 80% bonus, for example.)
2) Defensively- there's no skin in the game. You want to put forth the toughest defense team that you have. So, defensively, we're seeing the same PvP meta (Wraith - Courage - Bone Dragon - Famine, anyone?), and hamstringing the players trying to build offensively. I've also seen this week a double-Famine/Death combination- on Green day- which means either I pull out my Gard's team (which has only 2 Green troops, and hoses me on points), or I lose the match outright.
In addition- should you lose ANY match going in to the above team, you're instantly disqualified from the final, 750-base point match. That 8820 becomes 4410, hurting your guild. It also hurts your chance of being #1 in the Guild Wars rankings. (As we have yet to receive any rewards from a completed GW event, and the GW Rewards board has a 1, 2, 3, 4-6, 7-9, etc., just like the PvP leaderboards do, I'm assuming that you've instantly disqualified yourself into oblivion.) Mind you- I've gone 23-2 this week within Guild Wars. I do not expect to be within the top 100 as a result, which means I'm probably only going to get 9 to 12 Myzmers.
As such- this has a much higher risk/reward ratio than PvP. If you have a bad match there, you shake it off and move on. Prior to this week, I was winning at a 95%+ ratio in PvP, and I was able to complete 20 to 25 matches per hour.
Within Guild Wars, in order to get the full color bonus, your team is gimped- and I find myself taking an hour to get the five matches done, because I'm sitting there and trying to shake off the "omg omg I almost lost ONE troop because I didn't scan all 64 gems on the board, and they almost got me."
In addition, the time you take to test the troops you're about to go into battle with the next day cuts down on the enjoyment factor, and brings about much more of a "work" feel.
Now, our statues give us a 80% bonus. My 23-2 will be a better score than someone who has a 60% statue bonus (for example), even if they went 25-0. So, this is also less about how you did in Guild Wars, and more about what Guild you're currently in. Anonymous has 11 members who have gone 25-0 so far this week; there's the top 10 plus as far as rewards. I will assume the same for the top 10 guilds- that Intrim, Match Masters, Vn4ever, Marthos Guardians, etc. al., also will have people with perfect records and full statue bonuses.
I'm not about to say "Guild Wars is Broken". I'm saying that there's probably things that the developers did not think thoroughly through, give-and-take, when generating this new sub-genre within the game.