This chart may help around plots/skillpoints by level
As for 33 skill points for skill, it’s not a cost for that particular skill but for any next skill in that tree. It works like this: for first skill you choose from a tree it costs x, second costs y, … x and y are fixed but skills order is not. If you had account before the skills update you already have 4 skills unlocked in that tree regarding inventory size. If you want you can cleanse some of those, you lose 4 inventory slots per inventory skill level and that 33 will come down for next skill you want.
You are right that objectives should outline exactly what you need to complete them. One more point about them that is not clear is that they are optional! They are not meant to be done in order like quests, they are there to teach you certain aspects of the game and you can do them or not. If you’re not in portals and stuff you don’t have to do portal objectives ever. I think more appropriate term would be tutorials.
We have already commented about storage blocks in other threads that they should be craftable with basic recipes skill (one you have by default) because they are essential for gameplay.
@cor-karolis Thanks for the feedback, more there is game will be better 
and welcome to the community 
btw your avatar is awesome!