You’re not going to make the chassis “too stiff” for street use or daily use. Whether it’s worth it on not is up to you. Do you “need” additional stiffening for daily or street use? No. Will it improve handling and how the car feels? In my opinion, absolutely.
I have torque boxes, subframe connectors, a tubular lower radiator support and forward strut bars/J-bars on my Duster, I use it as a daily and it’s entirely street driven. Car feels much more solid and handling is more precise. But I have a lot of other stuff of my car, including 275/35/18 tires on the front and 295/40/18’s on the back with 1.12” torsion bars, front and rear sway bars, etc
