slot value was 1 million, so they over paid by 1.6 million. They also overpaid their 2nd pick by about 500k and #2 overall pick Dylan Crews is reported to be looking for 10 million, which would be 1 million over slot value.Travis Sykora officially signed for $2.6 million. The equivalent of pick 31 slot value.
It looks like they are investing heavily into their top picks and signing all their picks after that for much lower than slot value. A lot of their other picks where college players with no more eligibility and they are cutting 20k signing bonus deals. That savings is being spent on their top picks instead.
https://www.mlb.com/news/nationals-2023-draft-signings-tracker