The main problem here is to avoid tech micromanagement. Civ4 was quite bad - due to SoD the highest difficulty levels were a big challenge, so players tried to get everything they could, including playing with things like science percentage to get optimal results in techs. It would be great if this can be avoided.
...why? Imo, this is the entire point of higher difficulties and the strategyies that spring from attempting to beat them. Production/beaker spillover micro. Chopping micro. Whipping micro. All of these things made the game more interesting. Well, Civ4 anyway, civ5 was easy as all hell and you could beat that game blind.
The A.I. doesn't play fair on Deity - which has
always required the human to come up with it's own "cheats" to beat it. Micromanaging Eureka's seems like a fine addition to the higher level play. Of course, bothering with such a thing should be irrelevant on any difficult lower than the highest 2 or three.
In the end, you're still playing the Map and not
necessarily gaming the system. If you start 4 tiles away from the coast and know your second city is going to be coastal, so you choose to research half of fishing before you continue about the rest of your research path, I see nothing wrong with that. That is something you wouldn't do if you had no coast at all, or if you started on the coast you might just complete fishing right away.
So your strategy is still shifting depending on your surroundings which is working exactly as intended.
For the flavor of it all, it still fits. An empire that starts close to the sea but not on the sea may ponder the wonders of what it means to settle those lands. Perhaps they've sent explorers, philosophers, surveyors, and scientists to investigate the merits of a coastal settlement. They have returned with the
concepts of coastal living; fishing, sailing, and otherwise ruling the waves... concepts that cannot fully be realized until you as the leader take the risk of establishing that settlement; seeking out a way of life previously unknown to your people. The establishment of the city allows for all of the concepts and theories provided by your adventurers to be tested, and they have rung true! The waves are yours for the taking, if you desire master them further.
... Yea. You can "game" this system, and you can "RP" the system. I'm good with it.