I don’t know where you are getting this “Tier 4” crap from, but you’re obviously being given false information SOMEWHERE.
No one is saying Rugal is top tier. So stop saying stupid stuff where you compare Rugal to the top tier. The top tier IS better. That is a fact. THAT IS WHY THEY ARE TOP TIER.
The definition of a middle tier character is that they may do well against but cannot beat the top tier (if they do well, they are “upper-middle”) and they do well against and/or beat other middle tiers. They beat the lower tier characters. THAT IS WHY THEY ARE MIDDLE TIER.
Lower tier characters have trouble against most of the cast, but they can beat other characters in their lower tier.
And then there’s Kyosuke, who is in the bottom tier all by himself.
There are no set limitations for tiers. In A2, it was the Big Four of Ryu, Ken, Chun, and Rose… but in CvS1, it was Nakoruru and Guile dominating the remainder of the cast when teamed with powerful R1s. So there’s no set number of how many characters to put in each tier.
There’s a consensus within top players in Japan that A-Sakura is the best character in the game. However, based on SBO qualifier results (the only national tournament ANYWHERE with constant team/character record-keeping), she was tied for FIFTH most-used in the game (for the record, it was C-Sagat at 1, A-Bison at 2, A-Blanka at 3, K-Sagat at 4, and K-Cammy also tied for 5th). Nowhere in the top five does C-Chun appear, but anyone can tell you that C-Chun is top tier. C-Guile is 14th on the list (actually tied with K-Blanka for 13th), but we know that he is top tier also.
Taking the data without groove-specifics, Sakura and Guile don’t change in the rankings at all (although Chun moves up). However, Geese and Rolento are among the characters that move above Guile.
Vega, a character the US deems top tier, is tied with Guile and Ryu on the non-groove specific rankings (P-Vega tied for 19th on the overall rankings and C and N had one representative each, tieing for 39th).
So the facts don’t lie - top/high tier characters are not necessarily the most used in the game. Or in other words, the number of players using a character does not directly coincide to that character’s tier. Just because there is that “one ‘hit’” doesn’t mean that the character is not good. Ease of use does not have any bearing on the character’s tier. Tiers are determined by success when used to their fullest potential. That is the true judgment of the CHARACTER, independent of the player’s SKILL (or lack thereof in the US, as you state).
The Rugal player in Japan that completely dominated BAS at SBO and in subsequent tournaments lost only to Daigo in his qualifying tournament (I don’t have the official SBO brackets on hand), so he had to fight through the top players in the TOKYO area - the home of Amusement Forum More and all the top players that practice there. So his qualifying was NOT a fluke. Rugal, when used to his fullest potential, can COMPETE. He does NOT, in any way you choose to look at the data, SUCK.