Your money. Your call. Wait till the OP8 is launched to make any decision.
The oneplus 8 has not even been announced, nobody knows what specs it will have nor how many versions will be released.
Furthermore, the only person that can truly knows your needs and if it is worth the change is you.
Please use the existing threads about Oneplus 8 for discussion
Introducing Orbit - A revamped OnePlus Community App
by Zach X., 2021-10-13