The wood posts don’t really bother me as long as they are at least 4x4’s, and treated when subject to high moisture conditions where wood rot or pest attack is a concern (e.g. poorly ventilated crawl spaces) … although I do prefer to see masonry piers or steel columns due to those concerns.
While metal plates would be better at the beam to post connection, I’m assuming the house has typical bearing wall construction where the walls (and tie downs at those walls) provide the lateral/uplift resistance required by construction standards. Post and beam construction is a completely different story. But what rubs me the wrong way is that they used OSB scab plates, which fall apart like a cheap suit when they get wet. Not such a good idea in my mind for a moist crawl space area.
And the exposed bolt/anchor at the bottom of the post is probably to provide a positive connection between the base of the post and the foundations (assuming there is a connection below the black vapor barrier), which is required in higher seismic risk areas.
JMO & 2-nickels …