I just showed someone adverse yaw in a C150 today, and had them practising "Dutch rolls" (co-ordinated rolling side to side) on their second lesson... A C150/152 does need rudder for co-ordination. It's major problem, like so many other mundane training types, is it will still trundle around at the hands of the poorly skilled who don't use any rudder at all once they're off the ground.
Don't fall for the rubbish spouted by glider types either... Most of them lead turns with rudder and skid all over the sky believing they are sky gods because they are using their feet. Not always the case. In a Champ or Cub, you need rudder with aileron (as per C150/152, only A LOT more noticeable) plus reacting to all the nice effects caused by having a propeller, which gliding will teach you diddly squat about.
I would say it's your instructor probably leading you to not develop such skills, as it's probably totally lost on him/her and they're just watching the Hobbs ticking over thinking about filling their logbook in when they land. In all fairness, a lot of the things you can and can't do in an airplane will be lost on you too, and go right over your head at this stage of the game. If you want to be the best pilot you can be, seek good instruction, and always try and fly like you're on a test and to the best of your ability. Don't settle for letting poor technique and laziness creep into your flying like so many people seem to do. Fly approaches at exact air speeds, land on the centreline of the runway on the point you've determined, maintain altitude when flying level, fly co-ordinated at all times, respect the nose wheel in a tricycle u/c type, always have a plan B and C etc.
A VP-1 at our airfield is about £500 for a share, and less than £15/hour to fly. Even gliding isn't that cheap, when you look at some of the membership prices.
I'd recommend proper instruction on the Cessna you're flying now, then 15-20 hours in a cub or similar with someone who can show you how to make it sing, then practice, practice, practice. Aerobatics (again, taught by someone good) will also add to your skillset tremendously.
Only just read parkfell's input, but pretty much as they say. Learn to set the attitude, and trim to remove control forces once power and attitude are established... Too many fiddle with the trim constantly thinking they are doing the right thing while making matters worse! Fly smooth, but aggressive... Make control inputs smooth, don't fight against turbulence, ride with it, and be aggressive enough to make the aircraft behave how you want it to, when you want it to. Don't be scared of it, as it will only do what you tell it to.