Running the course at 15 off at any speed is a major accomplishment, congrats! Big school bus turns are caused by riding the tail of the ski. You can be on a high end slalom ski with the Mac Daddy binding setup and guess what? Get on the tail and here comes the bus
As long as your skiing slower speeds I think that HO is probably fine. 15 thru 28-32 off is all about working behind the boat.