Auto Sleeper Sussex EB Insulation

I have just purchased a 2012 Auto Sleeper Sussex EB PV. Have removed the rear door interior panel to check the bike rack securing bolts and notice the as fitted insulation is some kind of "thinsulate" material.
Only a small section (50%) of each area is covered and would not be considered fit for purpose.
Have looked at other areas and found there is no insulation over the rear wheel arches and similar sparse coverage behind the large sliding door panel.
I have purchased a roll of 35mm dacron/polyester insulation to make good the poor Auto Sleeper installation.
Any other PV owners have similar problems??
I notice Auto Sleepers are trumpeting the high insulation standard for the 2015 models!!