Whether you folks like it or not, the nerf is coming. What can be done is to come up with sensible suggestions instead of whining over the work you've put into your lineup. Haven't you heard not to put all your eggs into 1 basket?
Both the class restriction and the diminishing proc rate suggestions are leading the poll and also make a whole lot of sense. A 2-melee-2-archer+1 lineup could still make up a trigger "square" formation, and is less potent in the hands of A.I. Diminishing proc rate prevents a round-1-game-over scenario and allows yourself to retaliate. If you don't like them, come up with a suggestion of your own.
Actually, a 4 ranged command team is still possible to make even with the same class restriction applied, that's with WD Kahuna and SW Lucille, both using vampire rune. It's just that it does lesser damage compared to a quad-archer team. I'm actually expecting this as the next common-boring non-complicated setup on the top arena if ever the same class restriction is implemented. Not to mention, whales might even make extremely high ATK healers.
In the end, both nerf should be applied. Same number of class restriction and diminishing proc rate on trigger chains. Reason is, we still would not want to see a quad-archer team even with the diminishing proc rates, they will still do massive amounts of damage even with a few triggers.