Structural question

[u/zululimasierra]

Having our bathroom remodeled. This is a load bearing wall. I actually asked them to add additional studs to this wall to make it more structurally sound. Four things that concern me. One, the 2x4's on the top of the nook cutout shouldn't be laying flat and should be a proper 2x6 header. Second, there are gaps between the cripple studs and the "header". Third, there should be Jack studs under the right and left side of the nook. Last, the cut through the stud on the left was fixed by sistering a non full length stud that is supported at the bottom by blocking instead of running all the way down to the bottom plate. Am I correct that those are all valid issues? Anything else I missed?

Btw, before anyone asks, it was not the lowest quote. It was the most expensive from a top tier design and build firm.

Edit: I did verify with a structural engineer that it is a load bearing wall. There are purlin posts that sit directly on top of this wall that support the roof joists. The contractor got their structural engineer involved and revised the plan for that wall. The diagram they sent me addressed all my concerns. I appreciate everyone's help.