The purpose of heaving to is to get the boat to stabilize lying perpendicular to wind and waves. The benefit is that as the vessel drifts down wind it leaves it's own area of calm water in its' wake, therefore minimizing the chance of a big wave boarding the boat. The process also provides a relatively calm respite from challenging weather, by way of a controlled stop and smoother ride for your boat. I have heard some descriptions of the process as what I would consider a kind of slow scalloping rather than a complete stop, this is not a true heave-to. A true heave-to is accomplished on a sloop by backing the jib, hard sheeting the main to centerline and fixing the tiller to leeward. The main tries driving the vessel forward but is countered by the backwinded jib. The "downed " tiller prevents the vessel from bearing off to leeward. A typical sloop will balance surprisingly nice, but some atypical sail plans aren't as cooperative. My trimaran for example, had a very big mainsail and relatively small jib and wouldn't stop making headway because of the greater influence of the main. It would balance precariously but wouldn't come to a complete stop. Conveniently, a trimaran doesn't ordinarily need to heave-to, but I had to experiment. I have also tried the process on a Suncat without success. There is no jib to counter the forward thrust of the main. The best I could achieve was to ease the sail all the way out and drift beam to. I did this to get a reef in the main, and it was an exercise for a gymnast. It's one way of stopping the boat without lowering the sail but doesn't provide all the benefits of a true heave-to. The main benefit you will be lacking is that in a true heave-to situation the sails provide a significant dampening of the rolling motion. Luckily the designers of these boats have centuries of accumulated experience to call upon, and the results are built into the design. Wide beam, flat bottom, and ballasted keel all contribute to a very high degree of form stability or, the boat's resistance to being capsized. The gaff rig and long boom bring the sail's center of effort lower to reduce the wind's ability to tip the boat. Small cat boats are designed to be a daysailor as either a work or pleasure craft and don't ordinarily require the versatility of a more developed sail plan.
So long story short: use your boat within the design purpose and understand her limitations as well as strengths and you will come to respect her for her virtues. Vessels that come from Hutchins are proven designs and when sailed properly behave superbly. They aren't generally the fastest or the most weatherly, but they will provide safe and reliable sailing. Your Suncat is analogous to a Smart car, and I wouldn't recommend you drive one of those in a NASCAR race, so avoid venturing into weather that is beyond your comfort zone. Your Suncat will keep you safe but the rest is up to you.
Enjoy the things she was built to do best: extremely simple rigging at the launch ramp, a comfortable and safe ride for the family, and simplicity of sailing. With a cold beer in hand, you should come away from your day's adventure on the water with a smile on your face - PRICELESS.