It looks like most of the guitars I admire are going to a solid tailpiece mount - bent steel as opposed to a hinge. I feel like the angle of the bracket becomes critical when it’s not a hinge. If the springs are pulling ‘up’ on the bridge, the metal will want to bend/flex. It should equal out to some fixed position, but essentially you now have a spring holding the strings on, and to me, that sounds like asking for issues with tuning stability.