Micky, this is a serious suggestion so take it for what you will.
If you want bang for training as you've stated, ditch what you're doing and do full body workout 3 times a week
Add in there parallel bar dips, a rowing movement , overhead press and barbell curls.
I see what you are saying, but I have two problems with this approach:
1) Time spend in gym to do a proper full body workout is crazy, will just take too long for my liking, even if it's only three times a week.
2) Recovery, I benched on on Thursday before work, and my chest is still sore as I type this, I can still feel my muscles (back) from deadlifting Tuesday, and now is Sunday morning, I push myself fairly hard and recovery takes some time, plus I could not imagine benching, squatting, deadlifting and pressing all in one workout and repeating it two days later, may be when I was 21, not today.
5/3/1 seems to be a well thought out system and seems to be doing what I want it to do, I have no joint soreness, no injuries or odd pains, and I can get a basic workout knocked over in around 15 minutes if I am in a rush and still be adding weight to the bar every month.
Adding one extra exercise as I figure I can spare 30 minutes per day four times a week. I also do other training daily apart from lifting, as well as work full time, look after two primary aged kids, currently starting to build a house, set up my full time gym, rebuild cars, and train horses, probably too many hobbies, but stops me getting bored.
Another thing I have learned as I got older that for the average person who trains for health and wanting to look like they lift any longer that 20-40 minutes spend in the gym lifting is really wasting time, I am trying to figure out the point of diminishing returns for me, I am guessing for me it will be around the 30 minute mark, this point will be different for everyone and also dependant on your goals.
I work with a guy who spends 5 - 6 times the amount of time in the gym that I spend lifting, spends a fortune on supplements, is nearly 20 years younger than me, yet to me he does not look like he even lifts, he does not believe me when I tell him my total time spend training per week this year has averaged to be an hour to and hour and a half a week. Just a few days ago I told him I was thinking of upping my training to 30 minutes four times a week, and he did not believe me, he spends an hour and a half a day sometimes more……personally I have better things to do, just get in and get the job done IMO.
Using the words of Wendler,"Sometimes the things you don't do in the gym is what will make you succeed."