^ I've tripped on LSD for almost 20 years now, and it's just as magical as it was in the beginning. Re: the "loss of unpredictability", it's more like learning how to operate in that headspace more effectively, which is a desirable type of loss IMO.
Sex is a good analogy. Your first time you really really want to try it, and it ends up being super fun, but kind of weird and messy, and you wonder if you're missing something. Then after some practice you get better at it, more comfortable in a sexual context, and it becomes more awesome. If you have sex really often it can be pleasant, but not as great as if you have a bit of a break in between. And also, you'll never get your virginity back, but it's not really something you miss anyways. LSD is just like that, that's how I see it anyways.
I think you're right about one of the magical aspects of LSD being that you can interact with sober people really easily on it if you believe you can.
Regarding your micro-dosing: the higher end of those numbers sounds higher than "micro-dose", to me. Yes, dosing that often will diminish the magic for sure, even if they are small. You should try pausing for at least a week before a trip. People around here recommend two weeks or even a month between trips! But since your mini doses beforehand are small, maybe a week is good.
It sounds to me like you just need to space it out a bit more, or if you like it the way you're taking it, accept that there won't be full on magic every time.