So, I just discovered that the "make offset stick" option in Control Group Specific setting doesn't quite work. I assumed that it works similar to pressing J while moving, but this option does not actually maintain a formation.
Although the wiki claims that it is fine to just use group move, I find that for any of my main fleet(with or without regional effects like shields, protection, tachyon coverage, etc) survive much better if it can push through wormholes in less than 2 seconds. For the same reason, I find that Auto Kite is devastating(for my fleet) if I am actually controlling my blob(although it is useful when I spem Youngslings).
Looks like my fleet totally flavors range + alpha... Not sure if others are like that.