I have moved from a large case to using a couple of waterproof soft Ortleib bags instead.
As to the high level light, it is all but invisible. Not an issue here in Blighty but there are stories of the French Police getting grumpy about it. So a "clip on" LED strip under the straps would be the answer. The standard uit has a nice cable connector. The actual light unit is helf by 2 wood screws....takes 5 min to remove.
