I made a version without the Maz voice but got some feedback before I posted it that the montage felt a bit empty. But I see what you mean, the voice feels a bit like it’s not totally personal to Rey. I agree that it should be immersive and peaceful, but also dreamlike and indistinct.
RL, I feel what you mean in that it’s too long to not give something substantial away but too short to effectively separate the two scenes on each side. I’ve considered using bits from the end of TFA and Luke, but I really like the idea that Luke is a bit of a red herring for Rey and that the Jedi Texts are what the Force is ‘intending’ that she acquire before some accident befalls the tree. I really want this scene to be substantial and to act as the definitive awakening that Snoke refers to later, maybe triggered by Rey’s proximity to Kylo and his dark visions. The main reason I didn’t use any of the TFA island footage however is that it is too clear and un-dreamlike, with Rey walking around in an entirely new outfit. I think the misty Jedi Tree really works, if there was more footage like that it would be great.
An early idea for the scene was for it to be entirely without music, just having the sounds of the ocean and island. But that proved to be really difficult since it’s an almost entirely emotional scene and without music feels like limbo. Maybe with a longer scene I could fit the first part of the Jedi Steps.
JEDIT: I think a good way to include Luke while still keeping the focus on the Jedi Tree is simply to use more of the tree scene from TLJ. It could start with the ocean, and maybe put some mist in front of the island at night. Continue the mist shot of the Jedi Tree, and venture inside to see the texts. Rey could make an appearance in her poncho since it could conceivably be covering her TFA costume, and end the scene with the shadowy figure of Luke in the doorway asking who she is. This would solidly link the tree to TFA and keep Luke as the red herring.