Not really - if you add Tamiya 54752 you should be ok to go for your steering concern.
I assume your kit has adjustable shocks so you can mess with spring rates and fluids so no extra money here.

Want to firm up the tub for tighter steering response, they make an aftermarket carbon brace and that's $20 but not needed for rally.

If you want to lower the FDR you get the high speed gear set for $10. All in you're at maybe $50 and done.

If you really want to go faster, you need to find a non-tamiya motor mount and large pinion, but this is probably overkill for rally too.

Otherwise, you 'can' get the aluminum prop shaft and joint, it won't make you faster, but doesn't wobble like the stock one at higher speeds. Same with changing any of the non-adjustable parts for their adjustable options. These things usually are stock on the R and RR (and to a lesser extent D).
The $200 number you saw was probably for appearances stuff (aluminum and carbon all the things!) but don't really impact performance at this level.
As others have mentioned, the TT02 is good for spec racing, or racing at lower speeds. It is objectively an excellent racer, just not in every class under the sun.
If you want to do stuff in 17.5 TC, or USGT, it's not the chassis for you because at that level being able to tweak every little thing is important and the 02 doesn't have that ability without substantially changing lots of parts. Not saying it can't be done, but as others said, it ends up costing more than a basic kit from another brand.

Seth