What makes you think thease "Casual clans" would even care wahoo4?
Ever since CoD3, CoD has been a casual franchise, the games are designed from the ground up to appeal to casual gamers, and that, combined with a marketing machine that has made CoD a household name that everyone knows, means that it is what all their freinds are playing too.
Why should they care about Ro2? Sure there may be some buzz around the game right now, because it's new and something else, but even if the game included an FFA mode for them, what makes you think they would stick with it?
RO is not a casual game at it's heart, it's no CoD:MW, and a token FFA mode woulden't make it a casual game either, and still, all thease casuals will be finding themselves in a situation where all their freinds have the latest CoD, but not all of them will have Ro2, and there's going to be a new CoD released probably within 6 months of Ro2's release anyway, which again, all their freinds will buy.. so why exactly would they "convert"?
The casual market is huge, just look at all the players who play the likes of Halo, CoD and Madden, there's no denying there's a lot of them, and that there is tons of money to be made there, and with that in mind, i can fully understand why you think it would be good for buisness if Ro2 could rope thease players in.
But how is it going to do that? Ro2 is not a casual game, and an FFA mode would not be sufficient to turn it into one, it's just not what this player base is looking for in the first place, and whilst you could dupe them into buying it once, only some of them would play it, and probably only untill the next CoD is released, then they will dump it for that, and they won't be buying Ro3, having learned that it's not what they are looking for.
The only way to really rope thease players in, would be to kill RO, to turn it into a casual game, a bad clone of other popular franchises that they can relate to... only, even that doesen't work, it allways fails, just look at the latest MoH, it tried, and it failed.
And again, the reason is simply that casuals go with the flow, they play the new hot thing that all their freinds are playing, there was no good reason for them to dump CoD in favour of the new MoH, it was basically the same game, only, all their freinds where playing CoD, so that's what they continued to do.
A casual RO would face the exact same problem, it would be dumped by it's origional fanbase, because we don't want a casual shooter, in a vain attempt to attract a new and bigger playerbase.. but why should they care? TWI can't market the game like Activision can, RO is no household name, and again, all their freinds are playing CoD, and will buy the next CoD aswell, so that's where the casuals will be.
(Do note: I'm not trying to put words in your mouth here, i know you respect that RO is it's own game, you have said so several times, i'm just exploring what it'd take to rope in the casual market.. and i don't think the posibillity is even there for that, i think it would fail like MoH if they tried)
Ro2 absolutely can expand it's player base, and i firmly belive that it will, but it's not going to be the casual players that fill the ranks, Ro2 is no casual game, and any attempt to make it one would still not be able to compete with CoD anyway, so this is not where the bulk of new players will come from.
Some of them will come from the CoD community, but it won't be the casuals who is that franchise's target audience, no, it'll be the oldtimers who are growing tired of CoD, the ones who liked 1, UO and 2, but feels the series has gone down hill since then, the players who are angry and feel they have become second fiddle to the casual Console crowd.
Many more are likely to come from the BF community, again because that series has gone more Console, and more casual, and they want something more than that.
It'll also attract players from the ARMA and WWIIOL scene, who will come to it looking for some more instant action (funny that, to thease guys, Ro2 would be the more casual choice, the "jump in for fun" game in their arsenal.. perspective is a funny beast).
It will also attract a lot of the serious compettitive community, because it's skill based, and is one of few games to come out recently that has the propper tools they need to play on the PC, and it may even attract them from very different genres, who are all fleeing the "consoleization" of recent PC offerings.
And lets not forget the mod community, and all the players a mod freindly game can attract in todays market, where allmost nothing comes with a full SDK anymore.
There are a lot of players out there who are looking for something more substantial, something more PC minded, something more hardcore than the Console ports offer, and Ro2 is the game they are looking twords, Ro2 is damn near unique in todays market, just because it's a solid no-nonsense PC shooter, something we haven't seen since.. basically, since the Xbox360 was released (there have been a few PC only shooters, but most of them very buggy and conceptual, like the Stalker series, ARMA series, Metro 2033 and so on).
Thease are the players who are likely to join our ranks as RO fans, not the casuals, hopefully Ro2 will attract some of thouse too, who will play it and discover that this kind of game can also be fun, i hope we will see that, but the game should not go out of it's way to become more casual for them, because that would drive away the game's true fanbase, in favour of one who want's this weeks new flavour, and won't stick around.