Basically, we're all grasping at straws trying to find a fix. Anything promising gets tried, and anything that you customers think might work will get added in, in an effort to keep the customers happy.
Tension knots are the last great unsolved malfunction in BASE. I know tons of people who would love to find an answer for them. I know good, knowledgeable, experienced jumpers and riggers who think that;
Thinner lines tension knot more often
Thicker lines tension knot more often
New lines tension know more often (because they are stiffer)
Old lines tension knot more often (because they are fuzzier)
I know a master rigger who squeezes beeswax into his lines so that if they tension knot they will 'slip out'. I know a leading European jumper who sprays his lines with food grade silicon lubricant, for the same reason. I even know a jumper who replaced his upper control lines with a giant triangle of mesh (no lines = no tension knots).
The 'trunk and branch' system was created by Simon Perriard for the prototype that became the Squirrel Outlaw, and then added to and refined as it was replicated by other manufacturers. I think there is some good thinking there--I just haven't seen any evidence that it is actually effective in reducing the malfunction rate. I think everyone is still working on the problem, though, which is good.