Would it be possible to add some settings to it? like custom multipliers (x5 eg) or maybe something like x1.1 for every single research done (also customizable) that way you would really have to think if research x really is worth the extra 10% permanent research cost.

Someone should do this. It would be really cool. Unfortunately I don't play enough anymore to justify learning how to implement it.

Sorry for replying to old post but if anyone finds this maybe they will be interested to create such mod.
Exponential tech costs are implemented in Exotic Industries, each new finished research increases overall tech multiplier (the same as in game settings). I'm complete newbie in lua and modding so probably won't be able to write such mod myself but who knows...