You should ignore the dry weight of the trailer. In actual use it will be close to the gross trailer weight which is 3807. That number is the sum of the minimum tongue weight (307) and the max axle weight which is 3500. So each wheel needs to handle 3500/2= 1750 lbs to match the axle.
I'm pleasantly surprised that FR is putting 15 load range D tires on the trailer. They didn't do that in the past. The tires that came with mine were 14 inch LRC's rated at 1750, same as the axle. 2540 lbs gives you a nice 45% safety factor over the axle rating. That is the rating of the tires and wheels I upgraded to. I wouldn't change them, they should be fine.
If I were to upgrade something next it would be to add axle reinforcement to try to get the axle capacity up closer to what your tire rating is. There have been quite a few instances of bent axles reported on rpods due to the upward force on the axle ends because of the inboard location of the axle to frame attachments. There are a couple different options to do that and posts on it here. The simplest way is to use square u bolts to attach a 2x2x3/16 steel angle to the bottom of the axle. The steel angle needs to be bent slightly upwards in the center. I did this mod to my 179, only cost about $100.