Brembos are fine, but I’d change the pads, discs and fluid for sure. Falkens aren’t really what I’d class as performance tyres but if they’re that new you could sell them to offset the cost of new tyres. Bearing in mind they’re the only thing actually touching the ground, it’s worthwhile putting the best on there that you can imho. You’ll definitely want to put your money into brakes and tyres if you’re doing track days, although if you’re doing drift days too then maybe keep the Falkens to use as sacrificial ones on those days?