You have to think what the chances are of you getting a decent job after uni, specially as the way jobs are going, it might be years after before you start earning good money, dont know how good money is on rigs but I presume pretty good as it's good danger money?
Could always start your own fabricating business as well. Surely you wouldn't be on 16 year old pay thought if you've work with him atm?
Thats the point, I dont want to be a designer but the course offers me key skills eg. Engineering drawing module, CAD module and a degree. Just wondering if this will help me with were I want to go. And yes, rig money is good.... very very good.
Fabrication buissiness was going to be after rig work, earn my money, travel the world then settle down at aboot 40 and set up.
Do what you enjoy 
I done IT at college with the intentions of going to uni, but 2 years working on computers and I was sick of them.
Got my apprenticeship 5 years ago now doing mechanical fitting and love it. Do a variety of different jobs everyday and with overtime can earn a very good wage.
If you work hard and get your employer/assessor to give you different jobs you can complete a level 3 apprenticeship in 2 years most people finish in 3.
Thats the difficulty, all the advice I have been given leads to 'if you ever find a job you love, its the job for you' which is the exact position I am in at the moment.