ocean is gonna be a smaller one kinda like heart and home as i doubt itll get dungeons and the like as too many seeds have already generated alot of thier ocean biome by now as you simply cannot avoid it in most seeds to begin with.

but theyll maybe add some more sea creatures to fight in there sooner or later.
maybe even some sort of boss aka raidevent on ocean "the kraken is beeing released"

a bigger boat is also on the way probaly either with ashlands or shortly afterwards. its about time we get some boat progression again i mean the dvegr even have giant piers for boats. and doing that with deep north is simply too late. not much point in a new boat when you are already at the last biome anyway.

what i am wondering about is this :

its called DEEP NORTH. would it even make sense to spread this biome out on the map with world generation? seems a bit unlikely given the name of it. unless they rename it of course.

meanwhile ashlands is clearly undead themed again like the swamp so spirit damage will be useful once more.
some weapon classes are likely beeing left out by ashlands just like in other biomes. not sure which ones but guessing but what we got and what they showed in concept i assume these weaponclasses might get left out for ashlands (deep north HAS to have weapons for all classes as its the last biome and thus leaveing weaponclasses out at endgame would be a bit unfair) :

bow. didnt get one with plains. got one now. might not get one in ashlands and then deep north has the final one.

2 hand hammer. skipped 2 biomes before. if it skips again itll be now.

a new axe for chopping is not very likely with ashlands given the biomes nature. OR its reversed and deep north wont have one but that would a bit unlikely given its the end.

pretty sure magic wont see much upgrades in ashlands as its currently stronger than melee in alot of aspects already so it takeing a break would simply bring it in line with melee again. maybe a new lighting staff tough. but i doubt fire and ice staffs will see new versions already now given thier power. new food is very likely of course,

if the pickaxe doesnt get another upgrade itll be now. and then final one with deep north. otherwise there will be a new pickaxe in ashlands. this depends on what they do with flamemetal ore when the update hits. hard to predict therefore.

buckler will take a break. tower shield is 100% comeing.

polearms will take a break with ashlands. its thier last chance for a break.

a new mace is 100% comeing.