Rope bag (sling style) alternative

Sling style rope bags kinda suck. They put most of the weight on you neck and most importantly they totally throw of your balance when making sketchy moves on the approach. Water crossings, gaps, ledges, jumps, down climbs, loose scree fields, all made way worse with a loose bag swinging about from your neck.

What are your favorite ways to carry a rope along with a full trad rack?

I have just shoved everything in my backpacking back pack (rope included) in the past but it is not meant to hold up to the abuse of climbing, and is awkward (too large) to wear while leading.

My current system is a backpack with all my gear in it and then rope sling bag over my shoulder/neck. Feels like there could be significant improvement.

Get a climbing pack, shove everything in. Why are you leading with a backpack on?

Mountain hardware scrambler pack, metolius ropemaster stuffed within and rope butterflied/draped on top with the dangling loops secured with the side straps. At the Crag, I transport the rope with the metolius ropemaster which also has a sizable tarp. 

depends on the weather and route really. 1 rope or 2, are you and your partner splittig a rack? maybe also consider taking a rope appropriate for the cliff. so if you dont need a 60m dont bother with it. a single strand top rope solo rig using a 35m rope can be jammed in an 18l super light bag. but ive used a 25l rei traverse bag countless times to bavkpack the rope and gear solo with a sizable rack on my hips without issue.

lots of mission specific options. you could use the opportunity to practice mountaineers coil too. either way youre right and ive never been happy on any approach with a rope bag tbh.

saw a guy at the new carrying it on his head, seemed comfy

Rope goes on top of pack which has a good suspension.  Rope bag is for protecting rope, not for carrying it.

I've pretty much stopped using a rope bag all together.  Coil it and put it on top of the bag.  Use a tarp if you need it. 

However, when I did use one.  BD Super Slacker was my jam. 

Coil and carry diagonally across the body like you would a single length sling.

Weight is a bit more distributed than a skinny bit of webbing so it doesn't dig in bad, doesn't throw off balance. If you are proficient in over-under coils its already flaked as soon as you unwrap the locking loops and set it down. Would only catch on brush on one side of the body, easy to notice and fix or avoid.

Don't reinvent the wheel.

Backpack-style butterfly coil. Other partner carries the rack.  Or stuff everything in a 35 liter pack (carried by the follower on route). Or carry a small pack with the rope strapped on top. 

Get the right tool for the job. If your climbing with a pack for big in a day style climbs get a small 15-20L pack, or a running vest. Small packs have rope straps, otherwise I have layered the rope over the running vest in backpack coil style. 

I have Patagonia cragsmith bags (look on worn wear for a deal) the small 35l is big enough to carry a double rack, and the rope gets strapped to the top. The 45L is more like a 50 and can carry everything inside. I had a BD Creek 55 and didnt like the lack of back support, the Patagonia's carry much better.

Depends on how big of a pack you got.
Unlike the individual above me, I love the Creek 50. It holds weight extremely well IMO. Super comfortable.
I can carry a 10.5mm 450' static line, double rack, half gallon of water, lunch, shoes, chalk, and helmet in the main compartment. Room for layers and other things in the smaller outer compartment. Packing the rope well in the bottom makes it go well cause thats A LOT of rope. But if you're using 80m or less, its going to swallow everything you can throw at it and then some. But I'm not climbing with this thing.

Smaller pack? Butterfly coil with a middle wrap so it lays nicely when you strap to the top. Tarp in pack if needed, but if i'm climbing with a pack it usually means multi, so tarp is not needed. The MH multi pitch 30 has served me well as a pack to climb with or haul. The early versions made from x-pac are crazy durable. Putting a hard sheet (corrugated plastic) in the back sleeve of it is a game changer for comfort and adds like nothing weight wise.