[tomnov]

Most players won't have the cards available to field a full team in alot of those categories.
Who will? Those who have have opened (bought) tons of packs and have a plethora of cards in their collection.
Although it sounds intriguing, I think it suffers from this problem, and also think that these tourneys will take forever to fill, due to the limited number of players who will have teams they can submit to the parameters.

I think a more interesting tournament formula would be to create some low-xxxx level tournaments, such as Gold 80-85, Silver 70-75, Bronze 60-65, etc., to give those cards a bit more value in our collections, or maybe even some sort of capped tournament in Diamond/Gold/Silver/Bronze and maybe even Iron where the cap would allow for players in a spread of THAT LEVEL, and disallow those 40+ Iron cards like Connor Joe, Brooks Robinson, Milt Wilcox etc. that I get tired of seeing on my team and others in all of the capped formats. Set the cap or a hard limit so that only 2-3 at most of the top tier of a level can be used on a roster, and the rest of the cards of the level will make more meaningful contributions and you'll see more varied rosters and not the usual suspects.

I think that something along the lines of the above paragraph would generate more interest in tourneys than the idea of specific card type tournaments, while on the surface they sound good, just take a look at the realities of the amount of cards available in some of those individual categories: SE-61; OHW-453; RS-250; ATL-469.... Just MORE tournaments with the same players on all of the teams. I think that is the biggest turnoff for many tournament players even now.