I wasn't implying that you should have used slopes, because that would still remain as nothing but spam. You could implemented a more interesting design. For example, take that ice cave build that the beta testers did. It's small and interesting. The layout is perfect IMO and they made it interesting to walk inside and around that cave.
One last note, no matter how hard you work on something that doesn't mean it's great.
Tell you what, I'll hope onto the server in a sec to get a better look.
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Can't seem to find your server, what's the name/password if it got one?