Since the patch the client-side building has slowed down. I know this has been reported and is a known bug, but for me it has gotten worse;
Every time I (client) build a long conveyor, or even when my friend (host) does, or anything similar, it takes longer for it to render client-side than it did before and when making things like large walkways or foundations it will often bug and though the foundation/walkway *DOES* build, it's invisible to the client, but not the host, and though it can be walked upon, it's buggy because it's trying to make you fall through, then remembering it's actually there, so you stutter the whole way over the object. This used to only happen occasionally, now it happens frequently.