There will always be more players than Bijuu to share, so the idea of having a player simply getting some of the Bijuu's chakra like Kinkaku & Ginkaku
We don't need 20 or more pseudo jinks running around. It's bad enough with 10 of them, including the 0 tails. Allowing the splitting of their chakra is a terrible idea. Even in the slightest. If I remember correctly it was a resounding no from the community. 18 ban vs 1 no or something. It needs to stay that way.
and learning their special Jutsu like how Gaara can still manipulate sand, is a good idea. Bijuu can keep their status as trophies without limiting others from gaining their powers and chakra to improve their RP.
If a host masters a bijuu and then proceeds to lose it they will retain the traits that the beast granted them. I have Lava release from the Yonbi and Tomi has ink and so on. Only when mastered.