At this point, let me say I'm in favour of expansion. But I think what you say is true only if applied to a team entering the championship or C1. But were two teams to enter SL, presumably displacing two currently full time clubs, only to then pull out a few years hence then I think that would matter a great deal. And if I'm honest I think the likely overheads make the scenario of a pull out extremely likely.

Indeed, a conference system as part of a worldwide game is so obviously the answer.

Id definitely back a conference system, perfect way of developing teams and would mean that those teams could get a place in World Club Series which would get some decent publicity.

One place I have mentioned a number of times on here is for a team in Spain, specifically Barcelona. Catalans played there a few years ago and got a decent crowd in and the national team is really coming on, reaching the last stage of the WC qualifying after only existing for 3 years. Would be a perfect marketing tool when they played Catalans to really big it us as a derby and at least get people talking about the game in Spain. Plus there are loads of ex-pats there so some of them might go along, especially when English teams went there.

It would be better if all teams had a second team instead of farming out duel reg. players.

Italy could have teams in the French comps without much trouble you would think.
Some northern Italian towns are spitting distance away from the areas where league is played in France, and Northern Italy is where the majority of Italians in Australia hail from.
Italy already has a couple of comps, but they could lift their standards by playing sides like Toulouse and Pia.

I'd like to see a mixture of P&R with licensing in a conference system.

Eastern, Western and World.

The World conference to be licensed, so the likes of Catalans and Toulouse can be protected and can grow the game in their areas.

Eastern and Western conferences to have P&R via a MPG between the bottom team in each conference.

8 team straight knock out playoff between the top two from each conference and the 2 teams left with the most points (or the top of each each group and 5 teams with the most points thereafter).