As someone who works in the airline industry I would strongly recommend that you pack your 4 piece rods in their tubes along with your gear in a tough but plain looking, standard, hard sided, lockable (TSA lock preferably) suitcase. For me, a well used Samsonite is perfect.
I too like the look of the fishing holdalls out there but they scream 'steal me'. Soft bags with padlocked zips are almost laughable in the security they offer. Unless the material happens to be impervious to a blade
Pretty much anything can be stolen and broken into given time. The trick is to make your luggage appear unattractive and/or difficult to get into quickly.
The nice new Sage holdall coming along the conveyor belt or my battered plastic case? Which one would you choose to pilfer?
It's not a foolproof system but it's served me well for many years.
Cheers.