I'm not sure if either I understood this thread wrong or everyone else did, but I think this is really only about 1v1 duels. And the block limit isn't the total number of blocks, but the height limit that blocks can be placed.
I think it's pretty annoying when people use the blocks in the eggwars/op eggwars kit to pillar up instead of fighting. Especially since you need a rank to select a specific kit, so as a stone rank sometimes you can't avoid playing those kits. Also there isn't really a plain op kit without anything special like speed, fire etc.
I definitely would appreciate a lower maximum building height, for me even something between 5 and 10 blocks above ground level would be enough.