You're saying large signature sizes would make it into a pyramid scheme, since effective block size would be greatly reduced? Have you looked into ZKP signature aggregation? https://eprint.iacr.org/2021/1048
I spent some time this week digging into @roasbeef's post-quantum algo of choice: SPHINCS+
Will moving to SPHINCS+ turn bitcoin into a pyramid scheme?? Find out in the deep dive over on nostr:nprofile1qqspdxnzlynfj6eg3zugskygvllej8qywmder4xlp33cexl5z9fsyfs4k6wxs
Discussion
no the pyramid scheme is a reference to the hypertree structure that SPHINCS+ uses to embed lots of signatures under a single pubkey