Absolutely, please start a thread with any specific points you'd like to debate - I'm happy to participate.
I agree that this has been a heated discussion in the past - but over the 18months I have been following it, one thing always stood out to me. Those that were violently opposed to the "requirements" imposed by LMCE on network infrastructure almost universally misunderstood the actual requirements. By which I mean that they read them as being far more wide ranging than they actually are.
Similarly, those that actually understood the requirements, almost invariably did not explain them well enough to disavow the misconceptions above. It was very frustrating at times, and I tried to make clarifying points occasionally, but the discussions were commonly already too heated for them to penetrate!
The simple fact is, you can add a fully featured LMCE network, dual NIC'd, etc to an existing home subnet without changing a damn thing about that home network! Its true, that if you want to make more use of the existing equipment in your home network, it generally needs to be moved into the "internal" network, but that doesn't invalidate my point. That movement is merely enhancing your already valid LMCE environment, and by the time you make that move, most people will have already realised that the impact it has on the existing environment is trivial at best, and I imagine that most quickly decommission their "external" subnet in favour of a simple link to their modem/router once they realise this.
This isn't to say that there is no impact or inconvenience at all. I myself had an ADSL modem/router/AP and wanted to use the AP for my house, but it proved impossible to use that particular AP and still have it within the "internal" network as it was, by definition, on the external network. For a long time I just lived with that and a few firewall rules on the core. Eventually, I bought a cheap AP for the internal network and turned off the AP on the ADSL router.