TBH the best part of SCP roleplay in my opinion was the interaction between the foundation, GRU, UN, The weird mechanical church and all the GOIs. If you make a server, I think it would be more fun if it was focused on those interactions instead of purely SCP research (still need it tho, it's fun too and kind of a big deal in the foundation).
P.S: like
@SleepyMode said, don't do a shitty fuckin level up system where you start as a D Class. Don't do 100 Fukin jobs, cause that's the main problem with SCP rp servers