Suggestion: transform for tspan

When making topological (railway) map, I occasionally rotate some of my text so they don't overlap with other objects in the map. The problem is that the transform property does not work on tspan, so I must rely on transforming text element individually. While I can group text with same rotation under one text element, this lead to an unintuitive position of the text because the coordinates now rotate as well.

What I want is the ability to apply transform in tspan element so the text shares the same style with other tspan text gets transformed individually.

P.S. I know this issue has been reported to W3 in 2010 http://www.w3.org/Graphics/SVG/WG/track/issues/2316, sadly there is no action taken.