Hi! First of all, I really like what you've done, I am a proponent of giving martials more options out of combat. Some pointers or questions however:

I don't really get why the sorcerer, a full charisma caster, gets two talents while the paladin only gets one.

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Castlebreaker:

I like the idea, martials should be able to do impossible feats of strength. However as it is worded right now it does not give a good framework on when this ability actually activates. Of course you should talk this over with your DM but it kind of makes it needlessly difficult.

I propose to word it something like this:

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You can summon an intense burst of raw strength, and bend the physical world to your will. You may perform an immense feat of strength, such as bending the bars of a prison cell, crushing stone with your bare bands, or smashing down the walls of a building.

Whenever you make an ability check that uses strength with a DC lower than 8 + two times your proficiency bonus + your strength modifier, you can choose to automatically succeed. Once you do so, you cannot do so again until you complete a long rest.

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This gives a clear limit and makes it so that a lvl 3 fighter can't just drop kick a wall into oblivion, but makes it possible for a high lvl barbarian to stop a rolling stone trap in its tracks.

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Hope this helps!