While some of those blends may come close to what I might do, there are some things I wouldn't do.
1) I would not include garlic powder, onion powder or things like celery salt. Instead, I would go for the actual garlic, onion and celery, crushed or diced.
2) I would make blends to suite my own tastes, not somebody else's. In other words, I wouldn't do what somebody else does, though I might reflect on what they did as an influence to what I might do. Keep in mind that there is no sense making your own spice blends, if they just duplicate the commercial blends or somebody else's. Making your own spice blends is a liberation from the commercial blends and freedom to do your own.
3) Certain types of blends, I wouldn't even bother to create, but would instead, add various spices directly, to taste, depending upon the dish. Having a blend can be restrictive. Having the separate spices is not.