And horns to wrap lines the "old" way...I understand the new way offers a reasonable alternative, but I don't really see why that is an improvement necessarily.
Last week I had a slack rear line loop around the end of my Cab 2013 bar and there is a large bulge at the end of the bar. I spotted it just as the line tightened and the kite was going into the loop. I tried to get the line off but the bulge made it difficult, so the kite looped over and hit the beach. Maybe with the BRM bar I could have got the line off in time.
The BRM bar looks less 'snaggable' and winder ends add weight. I think I am like most people in that I can see that if you get used to the bar and how to wrap it, get used to unspinning without a stopper, get used to looping the kite the other way to remove any twists, it wouldn't seem a problem, but when you are not used to doing that, it looks inconvenient.
For the wrapping, as a trade-off, you get the lighter bar and less risk of snagging.
For no stopper, you get the option of a safe level of depower just by letting go of the bar and unrestricted sheeting.
For no swivel instead of the ring, you get another 3cm? of sheeting range.
It depends on whether in practice you would miss the on-the-fly trim given enough sheeting range. I'm going to wait and see how the feedback is on that. I don't think its worth modifying a spreader bar unless I think it would be necessary, and it would be a much better solution if a cleat is not needed.
As you say, there is always the possibility of having a a cleat below the releases. Letting go of the control bar and pulling the centrelines above the release would make it easy enough to use.
eg. by welding 2 mounting nuts onto a speader bar. But its more expense and hassle and is it really needed?