Those teams you mentioned are leaps and bounds from where they were 20 years ago. Success yes but money too. TCU and OSU are ranked Top 20 almost every year, sometimes top 10. They aren’t “little”. I dont think so anyway. And for big schools with lots of cash—like Texas—-haven’t really made that pay off in championships or even playoffs.
I could see big conferences including all teams but not with equal revenue sharing.
Yeah the problem is, if the Big 10 and SEC have their way, OSU and TCU are small fish and need to be cut out. That's a problem. The human ego can cause all sorts of unintended consequences.