I have completed the half over the years so we leave you around mile 11.
So from the start and until mile 11 IMHO it well very organised.
The stadium finish I was surprised to find was great and the crowd cheer you on.
At mile 11 you turn on to the pedestrian Red Ways from the closed roads so support might be sparse or none in some places. If your supporters do not know MK I think it could be hard to move about. But If they bring their bikes they can buzz about all over the place and easily go ahead and meet you at another point.
Enjoy .. see you at the start .. I will wave goodbye at mile 11