I find no problem in moving things around...
In some tanks, neither do I, but I have 9 tanks with it, some do, some don't.
I think is smaller systems, if you follow the suggestions, it works fine.
I still like and use it, but it's not forgiving for folks that redo things,
It is woefully inappropriate for large tanks like a 12ft and 16ft tanks.
None of these tanks, Amano's larger tanks are noteably missing the AS, can really achieve 100% with it.
You can argue with me till the cows home about this, but I have spent a logn of labor, time and energy trying to rectify things in larger systems without any decent results.
In smaller tanks, you cannot compare on equal terms, there are trade offs.
For smaller tanks, I still suggest using it.
Folks hear one side and then do not think about the other.