Yes – i have an 09 frame & noticed the both the same things. My solutions:-
1. For the cable guide on the DT that also holds the brake hose alongside I wrap a Park glueless patch around the cable outer making it a more similar thickness to the brake hose and also use a pair of thinner cable ties together and then both hose and cable are held (I noticed complete bikes from Orange use 2 thinner ties like this)
2. At the grommet in the swingarm I have slid a split piece of plastic pipe over the cable and held it in place with a a small zip tie – this is recent as noticed the grommet had worn through (hardly surprising when you think about it !?) It has held good for 6 rides so far so looks promising. It is 6x4mm air pipe.
As item 2 looked good I have tried the same at the DT cable guide but I’m not convinced it’s better so will probably go back to the park patch. Your piece of rubber sounds fine – check the cable holder on Fox forks.
email marcusstart@hotmail.co.uk if you want pics which may explain it better !