It's based on historic fieldhouse designs.
What follows is nothing personal mate, just some observations & opinion...
I'll be honest, I haven't got a fucking clue what a "historic fieldhouse design" is, but I'm pretty sure though that it's got absolutely nothing to do with English Football. And therefore it has no place, imho, in being the model for an English Football stadium.
I don't get the fixation with building a stadium based on American Football stadia. The only part of the game that is similar to footy is the fact that they're both played on rectangular pitches. As a spectacle, when compared to other UK invented games American footy is most similar to rugby (not footy) & I don't see a clamour for a version of Twickenham, afterall why would there be?
A footy stadium has a distinctly different job to and NFL stadium, firstly an NFL game lasts longer, people easily spend 4hrs+ in the stadium, so it needs to be more comfortable. Secondly, there are no away fans - so there has never been a tradition of singing & swearing at the opposition fans. Consequently NFL matches, in that regard, are largely anodyne affairs by comparison with say LFC vs. MUFC. There are dozens of other basic points about catering (due to length of time spent in the stadium) & even the size of the seats that are relevant but to be honest, I haven't got the time & I'm sure I've already given enough of an idea where I'm coming from...
Bottom line is this, any new stadium (or redeveloped Anfield) needs to be a football stadium first & foremost. Sure build in a few comfy seats, build in more corp. boxes, build in a fucking heli-pad if it'll get the high rollers in but please, make sure that the ground is tight as fuck, make sure the away fans have a corner they can feel boxed into, make sure the roof is nice & low to create a cauldron of noise rather than a massive open bowl or cavernous empty hall where the sound gets lost. Most of all, no big open spaces.
I'm not dead-set against moving but to be honest, none of the proposed new stadia be it the Parry Bowl (or the alternatives that floated around at that time), the G&H design or the Ian Ritchie 'sketches' fulfill those fairly basic requirements. If we're going to move & call the new stadium the 'Adidas Anfield Arena' (or whoever does pay up), we've got to make sure that the new stadium is worthy of the name.