I haven't been on platform pedals for a long time (10+years), but over the weekend, I decided to install new Origin8 pedals and try it on the trail.
To save weight, I put on a Truvativ Noir seatpost and a lighter Specialized Saddle. Also replaced the smaller 2.1 Highrollers to 2.35 Highrollers. The 2.35s are way much better, with minimal effect on weight.
Overall, the larger tires makes the bike more stable over loose gravel, muddy sections and wet roots, and builds confidence. Having platforms on allows me to go over steeper and more technical areas which I wouldn't have done with my clipless pedals. But now that I know I can do it on platforms, I'm sure I can do it using clipless... I may have the platforms on for a few rides more..
But still the clipless feels better.