The WD event is boring for the majority of the factions that don't find themselves on the bubble of a reward tier. So how about adding random, or not so random bonus units to the mix.

I'm thinking that if you get matched and suddenly both factions are informed that they are fighting for a 140k A/D unit that provides a certain % increase in either Defense or Attack, their interest and effort may increase a bit.

Just a thought...but if you do it, make the units worth while! Don't waste your efforts on rolling out crappy units.