Flux has given me a bit of info regarding C-3PO and R2-D2. Apparently the duo will have more screen time than they did in TFA.
According to Flux, R2 is with Rey and Luke the entire film while 3PO works with Chancellor Valara during the time Leia is unconscious. The duo only share one scene together when Rey and Luke rejoin the Resistance near the end of the film.
Flux also said that 3PO is gold plated all over, making him one solid color for the first time since Revenge of the Sith. R2 on the other hand looks very used and in need of some TLC. He is outdated as the common astromech model is the BB unit at this point in time.
I’ll share more as Flux informs me. He is working on another film now and his updates will be sparse.