To me, the hardware on the Roostas is not that bad and certainly not as bad as has become the reputation. The VMC hooks are okay and their split rings acceptable. It seems to have almost become folklore now that you must change the trebles to Owners. Well, if you go for a ST-66 Owner, I really don't think these are that much stronger than the VMCs.
It depends on what you are fishing for. If you're primarily fishing for GTs from 10 -15kgs, I think that by and large, you will probably get by on the VMCs. If you get a fish that will completely open a VMC, then i think that fish will probably compromise a ST-66 as well, albeit not to the same extent.
On the other hand, if you're looking at chasing BIG fish, then I personally believe you're better off going to a strong single hook for a Roosta or a Baker rig. The problem with the Roosta is that if you whack on a pair of ST-76 5/0a, it just gets a little unbalanced as the hooks are too heavy.
I personally do not believe the Roostas are suitable for big GTs. For these, go for a strongly constructed wooden popper.