I have not squatted in a suit before or benched with a shirt but I would be interested to try it. I think I may take a PL style squat for a variation sometime soon just to feel it out and see what I can do.
As for the competetion I think it could only motivate you more and give you set deadlines to shoot for. Sounds like you got all that under control though.
I would be curious to see how your wide stance squat compares to your normal squat. You might be surprised. I remember when I first tried going wide. My hips were very weak and my glute activation wasn't good enough. I think it can be very beneficial to do some wide stance stuff. Most people are very quad dominant.
I want to try a bench shirt again also. It is very painful. If it takes some of the stress off of my AC joints and I can increase the frequency that I bench press, then it will be worth it. I have been doing a lot of OH pressing, but that won't prepare me for a competition. I need to spend some time laying down.
I want to try squatting in a suit also. I've deadlifted in one (it did more harm than good). It really opens your eyes when you try lifting in gear. You have to learn to lift all over again, basically. Very complex. I have a lot more respect for the people that lift in gear and are successful after having tried it myself.