Divisions really have no bearing in the SEC. Everybody plays everybody and then they get ranked at the end of the season for SEC tournament standings. There is no East vs West in terms of anything important.
Bottom Line is you are missing the point. Big 12 is average in Soccer and Texas A&M didn't even make it to the championship game last year or win their conference. They just lost to an average side in Tennessee and to Florida who also doesn't travel far into the NCAA tournament. They will be competitive with a slew of 6 teams that are always competitive in the SEC and will not dominate or "be an eye opener". No slam against them - just a fact.