Well, the post's scenario is that each power comes with all others, but except what you have choosen, all attributes are peak human level
Because Speed doesn't grant (here), exactly, stamina and durability, ya know, maybe for strength (but only for the legs itself) and I guess the agility one is fine and makes sense...
And for the senses one... I guess you meant Reflexes, right? Well, that already includes in the Enhanced Speed option.