I think I only ever used the floating block idea in a17 and early a18. I was learning more and more about zombie AI and trial and error brought me to the bases I tend to use now. From studying how they move and what they do, I know the AI directs them to try to get to your level first, so, I make sure they mostly come from one direction. I raise my bases. Tactical decision...
I make the area I'm going to be standing in solid, dig down to stone and start building from there so I have a firm foundation under me. I sometimes use stairs, sometimes ladder/stair combination, sometimes they are jumping stairs, others they will come smoothly up. But, I love melee for early hoards, save that ammo for when you really, really need it, and, with that in mind, I have them run down pole blocks laid lengthwise to get to me. That way, I can knock them off. They are perfectly able to get to me, but I can knock them down so they have to come up again. Tactical advantage or cheese?...
I have to repair the bars I use to protect my fighting position until I'm high enough or rich enough to buy electric fences to hold them in place and keep them from beating on the bars and me, but some people would say cheese just because I can knock them down. For me, that's tactics... I get higher level, use steel so the base can withstand those feral/rad zombie fists and demo explosions. Is that cheese?
I don't know or I'm not sure if any of that could be used in reality... dig to rock? Ladders or stairs. Is that a bug in their pathing? Electric fences and dart traps and... Or, am I using my slightly less rotten brain. It's all relative.