Faithful: true to the facts, to a standard, or to an original
There is a difference between a faithful adaptation and a perfect recreation of an original. Matrix advertised this game as the "official licensed adaptation of the classic Empires in Arms™ board game," and that was sufficient enough.
By posting the link to the review, Matrix is agreeing with it.
This is not true.
Why did ADG approve it?
Only ADG can answer this, and frankly it's nobody else's business. I would suggest that it is part of the evolution of the game, from its original ADG release to its Avalon Hill release, to its official errata and game variants published in The General. All different. So which one was "right" and why would ADG "approve" such changes? And of course there are numerous house rules, unofficial variants and the whole EiH variant. Regardless, except for the fundamental compromises I mentioned previously, the other EiANW differences to the board game should be mostly resolveable through updates and the editor.
This just goes to show that the reviewer did not do his job properly.
The counter-argument is that customers did not do their homework either and willingly purchased a product that clearly didn't meet their expectations, and then proceeded to complain about their own poor judgement. Life is a two-way street. You go pointing fingers and forget there are three other fingers pointing back to you. Caveat emptor.