"So in Pharo5 we have these 'beautiful' unreadable tooltips: tiny black font on light gray (ie. take a look to its squeak counter part, it looks so much more pro)"
I am able to read the Pharo tooltips and I have a 6 degree myopia. Sure they can be improved a lot I would not call them pretty but at least for me they are good enough to useful and they rarely bother me.
