Yes, if you are okay with not locking your bootloader, anti-rollback does not concern you. Anti-rollback will only kick in if you have an older SPL and lock the bootloader.
Only, if you want or need to lock your bootloader. Some apps like banking apps require a locked bootloader.
Please also bear in mind, that locking the bootloader always wipes all data. This means, if you start using the phone without locking and want to lock it later, you will have to do backups and reconfigure everything after bootloader lock.
/e/ 3.1 is supposed to arrive this month. 3.1 will probably carry a more recent SPL. Waiting some time might be a good idea.