How about team islands without any warships. Only fish and transport.
If they wanted to also make it Castle Age only it would maybe be acceptable since historically there were very few real naval engagements during the height of the medieval period (think of how CK3 does not have sea units) but for a standard game yes would be completely ridiculous.what :D
then you have to land to win but with fish boom the only possibility to play is fc and then what .. just scout your island make outpost and landing is impossible. This idea is bs sry :D
same would be arena without siege