My ideal starting setup would have one or two more tech levels added to the start of the tree to smooth things out (first idea would be at tech 5/6), then start regions off like this: Western - 3/4/3, Byzantine 4/4/4, Muslim 4/4/4, Chinese 5/4/4, Indian 3/3/3. Most Western nations start with a +20% admin and mil tech penalty that gets steadily removed over the course of the first 50 years, moving away from Italy with a DHE to have it start in the Netherlands between 1470-1485 as well. Indians have a +20% to +30% tech penalty (this might also fade over time, but not as fast as in Europe), but the rest of them all have full tech growth. Some parts of Europe along the Med and Iberia actually have a diplo tech cost reduction, representing the strong naval tradition of the region. This should help insure European naval dominance at the start of the game.
Then you have a system that builds up to enlightenment based on conditions like there being lots of other nearby states, having certain government types, having at least x tech, having certain ideas, not having other ideas, decisions in various events, ect. Getting enlightenment adds like -30% tech costs across the board, which would hopefully be offset by a re-balanced tech increase cost over time. Enlightenment also steadily spreads through tech group, similar to the renaissance mechanic.
That said, I worry that the way the OP was written ruins any chance of having a legitimate discussion being taken seriously in this thread.