What about T'Kuvma's followers? Are we really to assume L'Rell and Voq were the last? I would think some Klingons would hack into everything they knew about Burnham and then get revenge. If not as of Season 2 Discovery, someone would be digging it up during the Organian War. Klingons do a lot of hacking. That's how they found out about Genesis. Remember Burnham didn't just kill T'Kuvma, she killed Kol, of House Kor, and his ship in a battle where she dishonorably beamed out. Klingons don't forget things like that. That would very much be of interest to Kor in TOS, and Spock would be a target.