For me Richardson should be out of the GP's, along with Pepe and possibly NKI. NKI shouldn't have been in in the first place - only Olsen and his BSI cohorts could possibly believe that NKI is a better rider than Hans Andersen. NKI does at least have the potential to improve, whereas Richardson and Pepe will most probably go backwards.
For me Steady should be in for next season - he is the top Brit in the averages (for now) and a vastly improved rider from last season. Hans Andersen should also be a must and I would include Joonas Kylmakorpi, who, like Steady has come on leaps and bounds this season. All these three are what I would call real racers, which the GP needs. Another rider worth considering is Jesper B, who has been in the GP before and is now recapturing the form that made him such a great prospect a few years ago.
I daresay had Kylmakorpi been a Latvian he would have got a wild card for this season - maybe a GP for Finland?