Welcome! Plenty of topics around tuning and the state of the tuning industry in general on this forum...
https://www.ecodieselram.com/forum/forums/ecodiesel-performance.28/
Welcome! Tuning will be your best solution.. check out our performance section for more info around tuning:
https://www.ecodieselram.com/forum/forums/ecodiesel-performance.28/
Looks good. Plasti-dip is really cool, and if you do it right it will last years.. I did my bowtie on my previous truck and it lasted over 2 years before it started to show a bit of wear.. easy fix, just pressure wash it off, then reapply.
Welcome! To get the settlement check you would have to get the reflash. For tuning, we've got a lot of topics around that here:
https://www.ecodieselram.com/forum/forums/ecodiesel-performance.28/
Welcome! It'd be a tough choice for me right now personally.. I'd drive both and compare. Since the 14 is likely out of warranty, I would steer away unless it's a smokin deal.