even Su-30MKI, Su-35S, and even stage 1 T-50 all have 2D TVC that is mounted in a ---\ /--- V-axis and can generate both vertical as well as lateral force, and can provide thrust even in the yaw plane(apart from the usual pitch axis thrust).
Hence some people call this kind of canted TVC as "virtual 3D "TVC, some prefer to call it 2.5D TVC.
So, even though this kind of TVC can articulate only in one axis, yet because it is mounted in a canted manner it can generate thrust in all three planes i.e., pitch, yaw and roll and can do the same job as REAL 3D TVC of MiG-29OVT/MiG-35.
So, what I 've read about FGFA is that the Russian engineers are trying to develop a flat nozzle engine(Type-30) which will have assymetric V-axis TVC and would do the same job as the one on the MKI. And the power loss also would be only 2-3%, when compared with F-22's thrust( around 8% loss of thrust).
Lets see whether they can develop something like that. Cause if they can, it would mean all aspect stealth like F-22 along with post-stall manoeuvring of the super-flankers(if not like that of Mig-29OVT)