I didn't find it that difficult to industrialize Greece. Did so in the late 1840s actually, never really wealthy but wealthy enough to afford some colonial adventures. I don't think it should become any easier, although more political events would be great.I've found that if you research too many commerce techs then the Greek capitalists will spend all of their money on goods instead of railways or factories. Some events I've scripted will hopefully tackle the industrialisation problem for Greece. One event is for the Russian faction to gain power after one of the coups/revolutions - as historical - meaning you will have the ability to build factories/railways yourself for a brief window. Another event will detail the rise of Trikoupis and his interventionist/railway-building policies, which means you will have a period of being able to build railways cheaper for a certain amount of time (this is done for Canada, IIRC, too).
So yes, the industrialisation problems for Greece will hopefully be eased. Of course, though, this is for the player to take advantage of this - Greece wasn't that industrialised during this time.
Oh, also there will be a clipper shipyard on start-up for Greece. This is to represent the Greek shipbuilding industry which was actually quite large during this period.