Unfortunately, the "can be researched continuously" isn't entirely accurate... You can research them an unlimited number of times back-to-back, but you have to re-select it each time. You can't just select it once and then (continuously) research it until the end of time.
My main complaint about the "Refined X" techs isn't the description, of course. It's that, when you get to that stage in the game, you have to go into the research screen and select them every turn or two, regardless of whether you're changing techs or not - there are just too many research points coming in, so they're completed annoyingly quickly. (And it's made even worse by the time that it takes the research screen to load.)
My suggestion would be that the cost of repeatable techs should increase each time they are repeated, either linearly (X the first time, 2X the second, 3X the third, etc.) or exponentially (double the cost each time). This would have the additional (IMO beneficial) effect of encouraging diversification of "Refined" tech research instead of just plowing ahead with one indefinitely.
Allowing you to use the "continue research" button to keep going on the same tech without having to go into the research screen would also be a big improvement.
Another nice thing at that stage would be some option for converting research points into other resources when there's nothing worthwhile remaining to discover (e.g., a "research consumer goods" option that converts research points into Gildar at, say, a 5:1 ratio).
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