They have upto 8 Sol-lands. 6 realistically, but still more than 4. The scenarios are closer to ~so often than ~never.
Point is, you need to answer their cards from turn 1. Without access to blue (or running the ultra-variant Mana Tithe), there are not many good ways to interact with such combos. Hence, putting blue and playing Bant is better in Combo metagames.
If, however, your metagame is Europe and everyone is running Mid-range, then by all means enjoy winning with Maverick. There is a good reason why Maverick is so underplayed in the United States metagame and that reason is because of the prevalence of Stoneblade and Combo.

