Honestly, there needs to be a non-V engine of about 350hp (the V needs to be 500) to compete with other cars in its class. The CTS is larger and heavier than other cars in that class. It needs more power.
#1) A better interior--all know this (Don't copy BMW, Audi or even Lexus--copy Maserati, Jaguar or Aston Martin--be class leading not following)
#2) MP3/aux jack
#3) Backup camera
#4) Rainsensing wipers
#5) Ventilated seats for those of us that live in hot climates
#6) Dual zone climate control with rear seat controls (I realize this is usually the domain of the STS/5-series, etc., but value is a good thing)
#7) In dash DVD (also the domain of the STS)
# A STIFFER SUSPENSION
#9) More road feel in the steering wheel
#10) Ditch the wooden steering wheel--it serves no purpose in a sports sedan
#11) NO FLEET sales on this one--keep our resale values higher
#12) A more powerful engine (torque and hp)--the Hyundai Azera beats the current CTS in 0-60 and hp--that's just wrong (I hope the Northstar is getting retired. It's waaaaaaaaaay long in the tooth.)