Pitchpoling, pitchpoling. Rake your mast back as conservatively recommended in the Hobie 16 Tuning Guide and you'll find your pitchpoling problem becomes a near non-issue. I sail my H16 single handed almost exclusively in 15-25 knt winds and I haven't PP'd in ages - and I push it pretty hard (eg wear a wake boarder helmut on the crazy days)
You'll find that adding foot holders/supports, including a pair as far aft as possible for those screaming reaches, makes big wind sailing the H16 a new experience. You become "one with the boat" if you will. You'll see, try it.
I sail Lake Champlain often and a neighbour has a Nacra 5.2. I beat him everytime time! And how can you beat the H16 in the waves?
PS I replaced my wire rigging last year and today the 6 inch section of forestay between the tang and the jib halyard block snapped in 12 knts wind on a close reach. Surprisingly, the rig collapse rather gently over the tramp and I was able to easily remove sails and clean up the rigging. I was 3 miles out - paddled for 1/2 hour then was towed the rest. Mmmmmmm