I'm not sure I can add more to 4Canada's comments....
Steering:
First, I learned to drive on older (no power steering) cars/trucks. So I know you have to use a little arm muscles at slow speed, and the steering will get lighter at higher speeds. This isn't bothersome at all, and has really gotten blown out of proportion by youtubers that are ONLY use to highly assisted power steering. The original cars (2015 model year) were poorly aligned at the factor and had a very nasty habit of following every groove on a road. I remember the first time I got stuck in a rain storm on grooved pavement, WHITE knuckled drive that was.... A good alignment (with some front toe in) helps a lot, and possibly installing the Alfa Workshops spacers makes it MUCH better. The car DOES have a fast rack, in other words, a minor change in wheel angle = big change in car direction. I'm not sure if its is faster or slower than the Porsche GT3/GT3RS or not, but it is quite quicker than most drivers are use too. Second, the car IS lightweight so will change direction QUICKLY, the 500 to 1000 lb difference a big difference on agility. In other words, fast rack + light weight = VERY AGILE and SENSITIVE Car. It is something you have to get use to... As for "weight" of the steering, I find it nice. It is light on the straights, but loads up nicely mid-corner so you actually have to work to drive the car. It is a decent balance, so it is just something you have to get use to.
Handling:
The 4C is NOT easy (in stock form) to drive FAST (ie. 9/10 or 10/10) as it does not cover up your mistakes. Too quick on steering, car gets upset... Too aggressive on brakes, car gets upset.... However this is NORMAL for a very mid-engined, lightweight car! This car WILL teach you about car dynamics! So many modern cars, modern sports cars included, make you look and feel like F1 driver due to modern driver aids. They can (and do) save many drivers.. What you have to learn as a 4C driver is to calm your inputs and work WITH the car to go fast together. As 4Canada noted, the rear bushings do cause you to feel not as secure with the back end as you could, but a cheap and easy fix is available. It is NOT anymore tail happy than any other high horse powered rear wheel drive car.s on the market I would even argue that it is less tail happy than a Corvette or Mustangs, as the weight is over the rear wheels. Any rear wheel drive car will step out (spin) if you hammer it on a corner! Now have I spun the car?, YES, yes I have.... I did it one time on the street, and the next day I signed up for DRIVERS EDUCATION on track. I have never spun the car on the road again... I have on track, but I'm still a novice on the track.
Misc:
I will COMPLETELY agree with 4Canada about the best part about the 4C is that it is usable and FUN on the street. The gears are short enough to slam around on the street, not like a standard Porsche. Mine car basically lives FOR the track, and about 75% of my drive time is on the track. It is fast and fun, and I have ZERO regrets buying the car almost 3 years ago.