I was going to edit that post, but figured you get that I was referring to the use of boards with significant capacity and not 3 phase installations.
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I'm very much in favour of breaking with convention, when doing so fulfills a need or improves upon convention - whether that be a one off circumstance or in a more widespread manner.
What I struggle with here are the potential limitations placed upon homeowners as that house could have new occupants 2 or 3 years from now, with very different requirements to the current occupant. It may be that you have got this installation bang on the money for the style of property, but I can only consider the issue from my own perspective and limited experiences. Your ideas may not meet with universal approval, but I like that they challenge convention and give me something to think about.