So, it will basically end up being a 23-13 or 24-12 map. The real toss-up seat is the Canseco one, but Dems will need to run the right candidate (Gallegos would be the correct choice). McCaul's seat is too partisanly divided (as well as geographically divided) for Dems to have a chance there, for now.
The obvious mistake the GOP made again was to not draw a Hispanic district in DFW. That being said, what the court did in Dallas really makes no sense. I would be surprised in the GOP doesn't realize its mistake this time and correct in 2013. As for the rest of the map, the protection of Doggett will probably be addressed by the GOP in 2013. As said many times here, the correct road to go would have been 25-11 (Canseco would always have some issues, so 24-12), but draw a Hispanic district or two looking towards the future.
Only if there is a Republican president. There won't be any mid-decade redistricting in the South if Obama's DOJ has any say in it.
Obama would probably preclear it anyway. The Obama DOJ had a chance to force new black majority districts in Alabama and South Carolina, but for whatever reason, they chose not to. Its almost like Obama doesnt care about having a Dem House.