I fish that bait and IMO, as far as castability is concerned, it doesn't seem any better or worse than any other A-Rigs I've fished.
Again, I believe the way the rig is casted, determines how it eventually lands & runs.
Additionally what weight heads are used and where they are positioned on the rig can be a factor.
I usually use all 1/8 oz heads but if I am going up in weight the heavier baits are always positioned on the bottom arms of the rig to act like a rudder.
I looked for some video of me casting an A-Rig and I found this from a few years back.
It's actually a day where a spinnerbait produced, but I started the day with the A-Rig.
This was a SK short arm bait I no longer fish because the brown bass were tearing the arms off it during the fight.
Here a a couple of casts . . .
I am and still use a 7'6" MH Mod Fast Graphite stick and 15-17 lb FC.
https://youtu.be/Z95g3H4qmp0?feature=shared&t=41
btw- in the video, if you slow down the playback speed, you'll be able to see the rod load a little better.
A-Jay