Baikal x10 is not fpga. It's just has programed algo's in chips. Baikal releases new software and it unlocks those programmed algos. All planed algo's were already in a chips before releasing batch1. They just introduce algorithms step by step with releasing software with needed changes.
Good analysis, what you think are the remaining 3 algos?
I'm pretty sure Groestl is at least one of them.