Real R&D and some ideas
In real life research and development
* Integrating a new technology takes time, the more so the less ready your people and infrastructure are for it. Even when the system is working, reaching the same level of quality takes time.
* Pioneers do the most work, followers have an easier time depending on how much they know about what the leaders have done, and have not done, and how technically ready they are to exploit the information -- the neighbor bonus in EU and the already-invented bonus in Imperialism were crude ways of reflecting this
So I think:
-> The current concept is headed in the right direction. It would make sense for technologies already invented elsewhere, particularly nearby, a long time ago, or by allies, should cost less than 10 RPs
-> It would make sense for the RP integation cost to depend on whether the recipient is already further down that tech tree branch and it is simply backfilling its technology portfolio
-> The recipient should be able to pick the order in which received technologies and other technologies are enabled in practice, so Switzerland could shelve a gift of Iron Steamers as long as it wished, not disrupting its intended research path -- could use a different color in the tech menu to indicate received techs and a number to indicate the RP cost, spent either from accumulated points when clicked if available, otherwise from ongoing research
I realize reality is of only limited relevance to the game, but these are some thoughts.