Most people use the standard "forearms parallel to ground when pole is planted" metric when buying ski poles. I believe this causes most people to buy poles that are much too long, making it more difficult to ski aggressively or on steep terrain.
For years I used poles that were "correct" according to the parallel forearm rule. When I switched to poles that were 3"-4" too short, my technique and confidence improved dramatically. The shorter poles forced me to keep my body more forward, more square to the hill, and lower...and pole plants became a natural part of the turn instead of an awkward initiation.
Conversely, too-long ski poles cause the following problems:
1) Upright, stiff, awkward stance
2) Pole plant comes too early in the turn, before you've committed
3) Can "cheat" by not having body square to the hill
4) As a result of 1), 2), and 3), you continually end up in the backseat
My contention: most people could improve their skiing by using shorter poles. Try renting or borrowing a size down from your current set.