Amusingly, you were pretty close in terms of overall layout. The only real differences is how the warp nacelles and engineering section connect with the rest of the ship. It's close enough to the official design that when I initially found this pic, I had thought this was you "tweaking" the official design to taste, not making a stab at what it might look like before any official designs were released.
I greatly would have preferred this design over the Cerritos we got...But I've got to say, the Big Wheels-esque show design HAS grown on me just a little bit. But this is a superior ship design and doesn't look as fragile as the canon design does.
Of course, part of the point of the Cerritos is that's it's not supposed to be a looker of a ship, as it's a low-level workhorse for Starfleet--the nameless redshirt of starships. And I personally kind of like it for that reason--it wasn't built for looks, it was built so to do a job, function over form.
But that said, I wouldn't have objected to this design either. It's honestly not that different anyway, the warp nacelles are just attached in a more traditional layout and bears a clear neck, but otherwise it's basically the same, externally.
yours is a awesome fan design
but does not not fit the job description the cerritos has nore how it is viewed by starfleet your design looks like a new ship that would be one of the first ships starfleet would send for a major taskforce