The front squat is great and you should definitely train it, but not at the expense of cutting out back squat. As an Olympic lifter, he is training for a sport. That sport requires him to invest a lot of time specializing in the front squat because that's a vital movement in the Clean and Jerk.
If you just want to get strong and look good then you should train the back squat and try to get it to about 1.5x bodyweight at the very least. Your front squat is generally supposed to be around 80% of your back squat.
Personally though, my front squat is weak and it's been something I'm trying to fix. I worked really hard on my back squat and am doing around 450lbs right now. Hoping to be closer to 500 by the years end. My front squat is only around 250lbs but should be closer to 315lbs according to the charts. So clearly I have some imbalances that need fixing.
I've also been doing what's called the zercher squat. You basically squat but with the bar tucked in the crook of your arm.
This is a really nice accessory lift for the squat and deadlift. It's great for training your chest to stay upright. It'll really hit your abs, upper and middle back really good. You just can't do the lift and have a weak core.
This was my Saturday workout where I hit my new 5 rep max to determine my numbers for this cycle..
Barbell squat. 1x 5RM, 2x 5 reps (85%)
3m30s rest between sets
Front Squat. 3x 6 reps (85% 5RM)
2m45s rest between sets
Zercher squat. 3x 8-15 reps (85% 5RM)
1m45s rest between sets
Leg Press Drop Set. 3x max effort sets. Basically one set to failure. Pull 45lbs and do second set to failure. Pull 45lbs and do third set to failure. No rest between sets.
Leg Curl. 3x 20 reps. (85lbs)
.......Superset with.....
Calf Raise. 3x 25 reps (225lbs)
1m45s rest between sets.
And that's it. I do that exact workout for the entire cycle and basically increase the weight by a few percentage points each session until I get to the end of the cycle and then I'll retest my maxes and start over with different intensity and rep ranges. I rotate between hypertrophy, strength, speed/power, and deload cycles.