Lots of thoughts for me here..
Speed Density- Works well, and cheap. MPG (as far as the drivetrain has to do with it) has more to do with the tuning then the hardware. Even beyond the map sensor and regarding the engine its hooked to.
Ultimately, i think if the new Dodge is to succeed, they should look back to the Dodge of the mid-90s up to the D-B takeover for inspiration. That was a golden age for ChryCo for several reasons, but the main one was product: They were very competitive and cohesive. Dodge definitely had a brand image. Hop in the way-back machine and think about the smash-hit releases in that time period:
92- Viper, nuff said?
93- LH cars (intrepid et al) were light years ahead of taurus, lumina, impala, crown vic in both styling and dynamics.
Jeep Grand Cherokee. Before there was Rx300, there was grand cherokee. Big available power and off-road potential, while showing that entry-lux small/midsize SUV was going to be a big ticket item.
94- Neon.. wow. Brought fun back to cheap. Great mileage, handling, acceleration, etc.
Ram...wow. Turned the entire truck market on its ear, and every current full-size truck sold shows lineage from this design.
95- Cloud cars (stratus/cirrus/breeze) with nice styling, ride, interior, etc. Blew Contour out of the water in everything but acceleration. Regarded at the time to be an excellent design.
Avenger/Sebring- not a smash hit but noteworthy because the Avenger had a beautiful brand-image Dodge front end that could have been the cornerstone of a high-performance midsize halo car(IF the car had been sold with a strong engine, it would have been every bit the success its Eclipse/Talon platform mates were.) The same basic styling plus a strong RWD drivetrain worked for the GTO many years later..
96- Minivans.. an incredibly superior design in 96.. this one shut the competition down so bad that they never really got back in the game.. Part of the reason we have Acadia's and Traverses now is because this design pretty much pushed the other domestics out of the minivan market and forced them to reskin as crossovers (i.e. Pacifica?).
97- Prowler. Incredibly important because it symbolized that Chryco would go where others wouldnt, and a shining example that Chryco could build something so desireable (to whom is another issue) that Honda got nothing on its resale value.
Dakota- An awesome truck in 97.. The 4.7L v8 and the R/t were notably neato.. turning radius was impressive. Styling was FAR ahead of 97 s10, ranger, tacoma, etc.
You can tell by now with the dodge stuff that even if you didnt like the styling, they had brand identity coming through in SPADES and in most cases offered more performance than competitors.. but things started to fall apart right here. Daimler buys Chrysler. 98 shows some stuff that was already in the pipeline..
98- New LH cars. Impressive stuff at the time, massive cars rated 28mpg hwy, comfy, good performance, etc. 250hp 3.5 v6 was highest rated n/a v6 sold, for a time! 300m was a styling, image, sales success. But then what? 2.7L v6 fiasco.. so bad there arent many left running. Did HUUUGE damage to Chrysler's reliability reputation and was not stopped until it was too late.. Why??
Also, chrysler powertrains began to stagnate at this point.. 250hp 3.5 in 98.... 235hp 3.5 in 2010? In that same time period, nissans VQ v6 went from 190 hp to 337!!!!
Also in 98, the biggest mistake ChryCo made in the 90s.. NOT producing the Copperhead. Copperhead could have and WOULD have been the midsize high-performance rwd halo car that everyone is still talking about. Demon, Razor? Bland after-thoughts to the Copperhead. Copperhead had A-berkeleying-STOUNDING styling, right size, right weight, right-wheel-drive, right EVERYTHING. It foretold the future success of SO many who also brought the right size, weight, styling, and rwd.. s2000, 350z, Solstice, Sky, NC Miata, rx-8, and others. An entire segment exploded around the concept of what this car could have been. It could have been the originator.. but now 12 years later we're asking why dodge still hasn't built something comparatively half-assed like the Razor? Gimme a break! Copperhead is the biggest mistake ChryCo made, that essentially gave away what had made Chryco special (the willingness to build Dodge..DIFFERENT) and marked the end of what had been an astounding run of smash-hit releases.
After that, there havent been many bright spots.. the PT cruiser was an incredible success sold mostly unchanged for most of a decade, and if the 2005-present mustang sent a royalty check to chrysler for proving retro would work with every sale, things might be different right now . Dodge had an awesome RWD concept Charger in 99 that never made it. The eventual LX cars have been a great success, but look at the 2011 charger.. the whole rear flanks area looks strikingly similar to the 99 concept.. onward, to what could have been and will eventually be!
So, i would say going forward with Dodge, look back to what worked then... STRONG brand identity, performance, excitement, willingness to do what others wouldnt (viper, prowler, dakota r/t, etc), and actually start innovating again!