Here's my take:
Chrysler
Sebring (Short term) Replace the current front fascia with one like that of the SEMA concept, revise the tail lights out back, and get rid of that black plastic on the C-pillar. Substantially improve the interior materials used, design is fine but the materials need to be much better. Put sound deadening material and work on reducing the 2.4's noise and harshness. Make the 6-speed standard. Drop the 2.7, replace it with the 3.5 as the Touring. Limited shout get the 4.0, 250 hp brings the numbers more in line with the rest of the class. Move it upmarket with standard alloys(Long Term) Redesign on shortened LY architecture, with new more powerful, more efficient Phoenix V6 engines, add Hybrid.
300: Redesign on LY with more focus on sleekness and elegance instead of gangster styling. Phoenix V6's and Hemi V8. Base model will have at least 5-speed automatic standard, alloys. Add Hybrid.
Pacifica: Brought back but redesigned and priced better, more space efficient, more sporting than the T&C. Phoenix Engines and a Hybrid
Town and Country: Refreshed with lessons learned from the VW...better handling, more elegant out back and much better interior design and materials.
PT Cruiser: Redesign as an marketed as a premium compact. Not retro. 2.4/6 speed standard. Light Pressure turbo version optional.
Aspen: Dropped
Crossifre: Redesign inspired by FirePower, build it off the Viper platform too. More sales of platform means the expensive can be paid off better, and therefore more profitable. make it a GT with the Hemi not the V10. This will be the new halo car.
Dodge
Caliber: New, vastly improved interior, CVT replaced by 4-speed automatics and 6-speed for the R/T. Rear end tweaked. engines refined to make less noise and harshness. Add sedan model.
Avenger: (Short Term) Redesigned interior with more emphasis on actual design, vastly improved materials and color choices. 2.4L should receive same refinements as Sebring. 4-speed standard, 6-speed optional. 2.7/6 speed. 3.5 replaced by 2.4 turbo from SRT4 (alternative could be 4.0 v6). (Long Term) Redesigned on Shortened Ly. Take 2 of mini Charger looks. Driver Oriented cockpit. Hybrid
Charger: Redesigned on LY. New V6 family, Hybrid, offer Hemi in low volume. Design should be an evolution of current one, still mean looking but more sleek.
Challenger: Just released, add Phoenix V6's when available.
Journey: 2.4/3.5/4.0 6-speed optional on 2.4, standard on the other engines. Add Phoenix engines when available. Redo interior, retune suspension to be more sporty. Add Hybrid
Caravan: Redo interior, retune suspension, redo back end.
Nitro: Drop, Liberty can pick up the slack.
Durango: Redesign with new interior and better driving Dynamics. IRS, Hybrid V6 and V8s. Small diesel from Ram.
Dakota: Redesigned with more fuel efficient engines, better styling, improved interior. Make use of innovations seen on the Ram. Diesel Hybrid
Ram. Just released, no updates needed.
Viper: Redesign to be be lighter, more fuel efficient but still very powerful. Better interior.
Jeep
Compass: Drop
Patriot: New interior, 2.0 refined with 5-speed manual or 4 speed automatic. 2.4L refined, 5-speed manual or 6-speed automatic. 2.4 light pressure turbo.
Liberty: Retune suspension for better on road prowess without loosing off road prowess. Base engine gets 5-speed autmatic as an option. Add 4.0 V6. Replace with Phoenix engines when available.
Wrangler: Redo interior, Add more powerful engine (4.0 and/or diesel)
Grand Cherokee: Redesign, better interior, on road manners, but keep off road prowess. Add diesel Hybrid. Make optional 3rd row.
Commander: Drop