Texas Live is huge, with multiple levels, and several different types of restaurants as well as bars. All will have multiple TVs. There is a huge central area that is basically a small theater with a giant screen, in addition to an outdoor patio area, that is partially covered.
After everyone heads into the game, there should be options for you to post up and watch the game without having to pay for a table, I would think even with the extra World Series crowd. There are plenty of options for food and drink, and most of it should be okay for the kid, they are not nightclubs or dive bars, they are higher end sports bars, or straight up restaurants, like Lockhart Smokehouse.