Do a search on "Gotts Mod". That is a less than $10 DIY intake improvement you can do yourself and it doesn't cause problems.
It sounds almost like you simply want better passing performance (get rid of that crappy lag during downshift to pass) and
reasonable highway economy? I'm not hearing you say you want to race your neighbors to the next stoplight, right?
I'd suggest having Bill replace the Level 1 tranny tune with an 87 octane performance tune that would improve highway economy. Leave the Level 2 and Level 3 tunes alone. You can always have them customized later if you start towing a lot, or, find you want to use the expensive kind of gas.
He'll improve the way the transmission shifts in his tune and I saw an improvement of about 0.5 mpg in economy between the canned tow and a custom tow tune. The canned tow tune, by the way gave me better economy (when not towing) than the "stock" tune. You should see improved economy in a non-towing tune as well.
Hope this is making sense. Bill is good at figuring out what you want if you just tell him exactly what kind of driving you do and where you do it. If you're mostly in the city, say so. If it's the highway, say that too, or, tell him it's a 50/50 mix. I do a lot of driving in the mountains, and Bill knows that too. Our speed limits in Tucson are generally 45 mph and everyone drives faster.
Hope this has helped.
- Jack
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2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam