I thought the replacement axles corrected the design fault in the originals. If so I don't think you have any case. Even if you replaced the axles like-for-like, I still don't think you have a case. Ford has a programme in place to replace the original axles should they fail.
I use the rear window when I drive to see what's behind me. My side mirrors show me what's in the lanes beside me and not what's in the lane behind me.
Maybe it's something to do with some Mavs having a window that opens in the rear.
Erh - don't let you tank get to E.
My 24 Tremor came with the funnel. Get your dealer to order one for free. You shouldn't have to pay for something twice.
There may be after market skid plates available. Your main challenge is the non-Tremor models have a very low airdam/front bumper. Virtually no clearance.
It's a tie-down for when you load something onto the tailgate (it also doubles as a beer opener). You can buy a replacement tie-down that is compatible with a damper. Just search this site.
The damper is slightly tricky to install but well worth it.
You paid $32,900 for the 25 and received $24,000 for the 24 (not bad if you paid $27,000). I make that $8,900 for the upgrade. Sounds like you paid cash for the 24 and did not finance it, otherwise your $400 per month would be a lot higher.
I don't know what you paid for your 24; but let's say $28,000. So you lost $4,000 on your trade-in and then spent an additional $8,900 for the 25. So trading up cost you $12,900 in total. Ouch.