Define "better"? The new materials get you a lightweight kite. So they stay in the air in lower winds than 3 strut kites with standard Dacron. I use a 8M A-Roam for super light conditions, but only because the 8M is as light if not lighter (1.67kg/3.7lbs) than an equivalent 8M SS UFO or BRM Cloud. At the wind speeds I use it in, in my location (the Gorge), the wind could shut off. If it does, a 3 strut is just a bit easier to get relaunched when little gusts come back. Plus, I like to keep it in case I want to pull out the directional or twin tip. If weight is your primary consideration - learn to use a single skin foil or hybrid kite. Nothing else comes close in weight. Why are they a no go in your area?
Some say the strutless kites pull more at the same wind speed. Maybe it's the slightly increased canopy area from lack of struts. Maybe it's the lack of structure so the canopy captures more of the wind power. But I think a lot of people who foil like the strutless kites for their fantastic maneuverability, drift, and the instant release of wind power from sheeting out. Maybe not the greatest for jumping, though Fred proves that doesn't necessarily hold you back. You didn't say why you didn't like the UFO. It could be that it takes some getting used to esp if your normal kites are 9 and 11m 3 strut kites. It took some practice to get used to the fast moving strutless kites (I use the BRM Clouds). But once you do, the 3 strut kites feel unacceptably slow.
That said, I'm still not making argument that you should go strutless rather than 3-strut. I'm just stating my preference. Here in the Gorge I've seen plenty of AMAZING foilers on standard 3 strut kites. There was this regular in Hood River this summer who was likely a North sponsored rider - all North gear - who was flying a North Reach 7m and was throwing enormous mega loops. But this was in like 15-18 knot winds. I don't know what he would use in light wind if he went out at all in light winds. We don't often get light winds here.