A few downsides, the actual body that does damage only has 7 health vs Cyclops Defender so it's a little easier to remove (dies to Hunting Trap as well), and the walls are just free favor at some point. Doesn't jive as well with Shaped Blast. Takes up more space and ups Rapture Dance damage. If the opponent has a bunch of smaller creatures, it takes more time to get rid of them since they're not trading into any damage. Definitely better for stalling though.