The way I read the question is that Zigzag is asking for some insight on possible developments. Ie whether we have plans to support any creative coding environments like we did QC and Flash in the past.
We don't have any definite plans, but shader support is certainly on the table. Even when some opportunity pops up to support another coding environment, the chance that they don't support shaders is so small, it's pretty much non-existent. So learning shaders is always going to be a smart move.
You're asking about what's currently possible, which is a completely different question. Personally, the idea of syphoning a texture in while OSC'ing control data out feels so flaky and work-aroundy, I would rather spent a weekend learning Shaderloader than having to go through all that jazz. But that's my opinion.
does anyone have a recommended platform for continuing with GLSL?
Shaders are so common that you can even develop them in the browser. The site I linked even lets you re-compile their examples in realtime, so you can see the result of small changes immediately.