Hiho, nice chart although somewhat misleading IMO.
As with the other damage lists in the forum the pure numbers don't reflect the gaming reality completely all the time.

For example you list bombers, heavy cruisers and LRMs as "poor vs" capital ships because they only do 75% damage, however everything but other capital ships or advent LRMs does less. So while it might be true that those unit types have reduced damage vs capitals they are still the best choice.

You also list flaks as "good" vs light frigates, however they will be shred to bits by the same number of light frigates (which would be cheaper) without many losses.

I'm sure there is more of this and as I said that's not only true for this, but for all damage charts.