The square footage, even with 11-a-side on an American football field, is still slightly tighter per player than 13-a-side on international fields, but it is quite comparable. If you are talking about the supposed best players not in NRL and SL on the pitch within American football bounderies, that's madness, it will be too low scoring and will risk way too many injuries.
The question was not what Americans do with goalposts (rugby union does the same thing league does), the question was what official international games do. Big difference. What NBA does and what FIBA does are different things and done for different reasons. Everything I've seen is neither NRL or SL uses 100% international rules anyway, they use rules that work for them. Smaller space=fewer players. rl1908.com was talking about going down to 11-a-side anyway to reduce costs and increase scoring, although I presume it would be on a field similar to what NRL uses now, so it's not just some message board rabble-rouser suggesting this, it's one of your own:
http://www.rl1908.com/blog/11-aside-rugby.htm
Yes, my idea would be a 10-yard markoff minimum for kicks at goal for conversions.
As to who you pull off, I do believe I saw some rules comps for younger ages suggest 6 forwards and 5 backs if you went 11-a-side. The comparison I would use is hockey rinks. To be able to play any other sport in an arena, whether it be indoor/arena football, indoor lacrosse, or indoor soccer, the league has to modify the outdoor game to make it work on an inside rink.
Again, if you have alternate blue lines, it's going to look as silly as the AMNRL final. You're going to end up with second or third-class venues, prob. those that don't even sell alcohol, which again, means NOT professional. I'd suggest playing on current football lines, which means 11-a-side. Just like NRL and SL players go to international rules in international matches, so would this league.
I would also point out that the "gridiron" lines during MLS games is a primary reason soccer fans wanted their own venues. No reason to look like some other sport's "red-headed stepchild." Frankly, a pro union league would work in MLS venues except they don't play winter-spring to make it work.
As to the "carnival" tour, it dawned on me that Niu claimed this would be a way to see what market would work. Bad idea for several reasons:
1. You really expect people to sit through several games at once?
2. The number of teams there would still be under 8 most likely.
3. Suppose a market "fails" in this trial run. That makes it even harder to find another city in which you have no idea if they are a suitable market.
This sounds so "UFL-ish." Are we going to have "NRLUS Florida" and "NRLUS California" as team names, too? The UFL almost did that before a bunch of UFL fans on message boards raised hell about it. They did go with pastel uniforms with was laughable. They touted, "team in New York City" itself and announced a league WITHOUT SECURING A VENUE. Now that team is going to Hartford. What a joke. Yet that league at least updates their website and takes their hits.
You get the venues, then you announce the teams, then you get the logos and uniforms out, and you take a year to market. Of course, to do all that, those secretive investors have to be announced and they have to write the checks, if they exist.
No, you need a year to market the teams AFTER the venues are announced and rent paid for. In that year, you need either SL or NRL on a cable TV channel with ads promoting this American league, to educate Americans. You also need a year to train American players. The idea that we're going to take the scraps from the NFL and be on par with NRL and SL is insulting to them. There needs to be some official affiliation with NRL and/or SL but it must also be explicitly stated after 3-5 years no more affiliations, you 're on your own. (MLS champs Real Salt Lake STILL has an affiliation with Real Madrid. No wonder nobody takes MLS seriously as a top-league.) Otherwise, it will be considered "minor league" and I can promise you Americans will not support a minor league masquerading as major league.