That flex joint has already started to wear, give it a few more scrapes and it will have holes so I guess the exhaust will have to be changed soon...
The suspension being stiffer doesn't make the car handle better, the whole package has to be adjusted to suit. Higher spring rates, heavier dampening, stronger sway bars, bracing, the list goes on. Each will interact with the other parts and needs to be matched, even then ride height is usually not changed much. You have successfully made your car slower and more dangerous.
Without getting a proper wheel alignment you are in danger of causing an accident. Your wheels will be pointing off in the wrong direction like a lazy eyed relative. If you haven't done it, book it in now before you kill someone.
I don't care if you wear the tyres out in a few months as long as you change them. Bald tyres are very bad for your health. So in effect there are many reasons the police will be picking on you now, most of them safety related.