first of all, CLAMP actually states that (well in their interview) that the theme behind CCS is to promote the idea of 'unconditional love'.
So therefore, if you guys cringe/shiver at the thought of somewhat odd pairings (like Rika X terenda, kaho X eriol *shudders a bit*) I guess you have to respect the decisions of CLAMP. Even though I could not accept yaoi/yuri/LARGE age difference/etc of the rest of the CCS pairings...
i mean basically CCS is a very complex story if you talking about relationships. And if u think twice, most of the couples (well yea i think they are mostly paired up) are well, weird and freakish. So it forms this whole formulae of S + S being the most 'healthiest' couple. Tomoyo and Eriol is a gd match too, but well it only remains in fanfictions unfortunately, since Eriol is to be stuck with Kaho...= = *sigh* overall, we have to accept the fact that E + T only remains in our 'dreams'. haha. But in other ways, Tomoyo is paired up with Kurogane in TRC. So does that mean CLAMP begins to realize the importance of Tomoyo...haha dunno.