Balancers are conceptually cool so I understand the appeal of trying to find aesthetically pleasing, compact or otherwise interesting designs, however I just don't think they have practical use outside of the two niches I listed (loading ores, and fixing mistakes.)

For instance on Gleba, you better have a plan to either use or burn the full belt. It doesn't matter if you're balancing the lanes, you need a plan for the same throughput of spoilage.