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The major overhaul was probably a bit of an over-reaction, though it probably won't do any harm. Personally I'm a huge fan of an annual cleaning of this magnitude. Not a good idea every week, but I don't think it does any harm. Most of the biological filtration lives on surfaces, not in the water. So provided you kept the same rock and sand, your bio-filter should still be largely intact. The only concern I would have is if you have a deep sand bed. Deep sand beds if disturbed can release hydrogen sulfide gas into the water and kill your livestock. Personally I'm not a fan of DSBs, in my experience they tend to be a bit more temperamental than a minimal sand bed.
You may experience a mini cycle, you may not. Keep an eye on the Ammonia, Nitrite, Nitrate and Phosphate over the next week or so, you might need some Zeolyte, GFO/phosgaurd, or another partial water change if things get bad, but IME, even a major cleaning hasn't caused much of a mini cycle. If you have some, or can get some a probiotic for the next few days is probably prudent. Seachem Stability, Dr. Tim's One and Only or Zeobak are all good.
Also, while carbon and poly filter are both useful, do be careful about over doing the chemical filtration if you have any softies/zoas/shrooms, azoanthellate corals, or other filter feeders. Water that is too clean can actually starve these, and you just did a 100% water change.
Don't worry too much. Likelyhood is that it will be fine.
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