Some teams at the top meet but once a decade. It can take up to twelve years for teams to complete a H/H with another teams. When Texas and Oklahoma join the SEC, the problem will deepen.
There is a growing movement that the conference adopt a 9 game or perhaps even a 10-game conference schedule.
Saban is in favor of the latter, Sankey appears to prefer the current setup. He opined as to why the SEC should adopt more conference games when the Big Ten and PAC 12 are likely going to 8.