In addition to the things mentioned:
stepping through the ball of the foot
HIGH releve throughout routine (important enough to mention again)
Finishing the coupe and pivot turns on relelve
Staying straight in the 2nd part of the dismount (a lot of newer 4's pike down to the floor as they turn and drop)
Head up throughout routine
Head in on handstands
Body tightness throughout
In our area the difference between a 9.0 beam routine (level 4) and a 9.6 or higher is huge. Many small issues usually in the lower nines while the 9.6+ looks sharp, confindent, polished, nearly perfect.
If they are not getting feedback and they do not see anything glaringly missing it is probably many small issues, lots of .05 deductions for things that were pretty good but could be better.
I have found (provided no falls and they make the dismount) our new 4's usually get their largest deduction on their leap, also one of the harder things to fix for new 4's.
Advice ... lots of repetition and nitpicking
