Not many Tech fans I've encountered think that is an issue concerning alignment, and, being from Virginia, I don't either.
The Virginia General Assembly is likely not going to interfere with this, because it's going to be bringing one of their two biggest state schools recognition and money. The legislature only got involved last time because Tech wanted into the ACC, and the government could use UVa as leverage to achieve that end.
I highly doubt they will block Tech from leaving, because what they will act for for the schools is what is best for each school individually; they aren't worried about preserving that rivalry, either, because Tech and UVa have done it before while in different conferences. I can guarantee that they aren't worried about UVa getting left out in all of this, because chances are that UVa will not. They're good enough in other sports to be competitive, their football program appears to be turning around, and the academics boost they would bring could turn out to be valuable.
The circumstances are very different from the OU-Okie State, Kansas-Kansas State situations.