The DEBATABLE
The part where you can make units in just 5 mins and above can also be exploited when an enemy tries to rush someone where there are no units in the area. But 5 mins later, they see an infantry, maybe even a few more in a few minutes. On the one hand it STOPS RUSHES but gives no justice to the person who boldly and ingeniously rushed the enemy, but on the latter, maybe it is a REALISTIC APPROACH because you cannot really rush in the Great War. Doing so would really screw the other team because one guy who got rushed leaves the entire teams back-line open for rushes. With this feature, the team can create units fast so the enemy cannot push that fast.
THE SOMEWHAT BAD
Visual graphics mentioned above aside, another issue is the unit levels: when produced, the units level stay the same. When these units get "out-teched", there main use is just home defence or military police in low morale areas. Either that or still use them in assaults in hopes to make a difference. Still, the issue here is the units UPKEEP. It is much preferable to sacrifice them than lose out on a bit of resources when the tech difference is significant - but only if these units have no use or are just defence.
Disclaimer: Just a perspective of someone who wants to save up resources. Other than that, units are not a complete waste.
THE BROKEN BAD (that it could be exploited)
Umm Bytro... Are you saying it takes all of the units health for the unit to be destroyed?! This feature can be exploited fast by just making a huge stack with lots of health just charge at everything without expecting any losses. You kill maybe 30 units but suffer NO CASUALTIES because the army group still has a decent chunk of health? The base game mechanics where both units die is a lot more safe as it really encourages players to make an army group that will surely have an advantage over the other units to breakthrough or cause more casualties.
If you want any clarifications of this post just ask! All these are just CLAIMS OR OPINIONS OR FEEDBACK so please take them into consideration - just want Bytro to look into these cases and whether to rebalance these or not. In any case, high praise to Bytro personnel for delivering this event! Having tons of fun playing the gamemode! Top 10 anime crossovers or something xD
Best Wishes,
~ Cpt Mystic Stirling ;P