I am not sure you understand how the schedule worked and now works.
Here is what every team in the east played, except themselves:
UGA, UF, UTjr, USCjr, Ky, Vandy, Mizzou - every year. In addition to that they played 1 regular West team, and 1 West team every 6 years. That means that unless they played them every year, they played Bama, LSU, ATM, Auburn and Ole Miss once every 6 years.
Now, unless they get the annually, they play Bama, LSU, UGA, ATM, Auburn, UTjr, twice every four years.
I am leaving out OU and TX as this is a comparison of SECE and SECW.
Every team in the SECE had their schedule get more difficult. Instead of getting Bama, LSU, ATM, and Ole Miss every 6 years, they get them every other year. And they still get UGA, UF, and UTjr every other year.
What's more difficult in a 6 year period?
6 UGA
1 Bama
1 LSU
1 OM
1 ATM
1 Auburn
6 UF
6 UTjr
or
3 UGA
3 Bama
3 LSU
3 OM
3 ATM
3 Auburn
3 UF
3 UTjr