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If you decide to try trim tabs I'd go with real trim tabs. I've always felt there's no hard and fast rules with trim tabs and that they are useful on almost any boat, and necessary on some. Some boats (deep v's for example) are optimized for some things but can end up lacking in some ways because of it.
I use them regularly on a deep V at night to help me hang on plane at a slower speed when the boat is heavily loaded or viz is low and I want to be on plane. Otherwise I would have to move faster then I would like to or fall off plane and go slower then necessary with my bow pointed skyward.
Also I often drop them (especially when heavy on fuel, passengers, and ice it makes a big difference) to get on plane quicker.
On many hulls, especially go fast centers dropping the bow into choppy seas is standard procedure and achieving that via engine trim isn't the best way to do it.
I avoid correcting list with a tab if I can move weight or passengers instead as you can feel the drag of the single lowered tab.
The 24 foot center I generally run would really be a mess without them, especially at battle weight with a crew, ice, and a full tank of fuel. Once it is lightened up after burning off some of the tank, its behavior in rough seas, ride quality, and fuel efficiency are still greatly effected by the trim tabs. It was built for them; if they are fully up, at any speed and fuel load it will not plane happily. It'll get up, it just doesn't feel right, it feels uneasy and the bow porpoises along. Trimmed properly, and speed and fuel efficiency noticeably climb (despite the same throttle setting). You can literally feel the boat get "happy" when it's trimmed right. The engines start to sing and all is right with the world. If you're really sensitive to your boat even a person or two moving to the bow might want to make you back off a touch on the trim.
It's important to note some boats respond to and/or need them more then others, but I think it would be rare to find a boat (and it's passengers) that wouldn't benefit from them. Maybe Grady has an opinion on how helpful tabs are on that hull?
As suggested though a starting point might be taking a look at the prop.
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