I like how your ride turned out!My answer to this is going to be yes they will help but depending on the amount of weight you still may have a little sag. I had to haul samples for work last week and had somewhere between 600 and 700 pounds in the hatch with the back seats folded down. It wasn't on the bump stops and it actually had a decent amount of travel left when my coworker was stand on my hitch bouncing up and down cause he couldn't believe it didn't bottom out but yes I was a little bit saggy then.
Did you only install the springs? Just wanted to make sure I didn't need to get shock extensions or change out the shock completely with the springs. I noticed on their site that they have alignment options as well.
Also are you planning on changing out the tires? It seems like it could take 235/75/15 well, as the guys who run spacer lifts do.
I'm looking into doing a spring lift like yours. Just wanted to get your opinion on it.