Not really cheery picking, I chose two clubs who are local to Bracknell who moved out of their towns. It's easy to leave your town, it's not so easy to get back. To pick another local example, I can totally understand why Maidenhead United will be moving away from York Road, but they aren't moving to a new ground in Slough or Windsor to do so.Cherry picking clubs you can find one to "prove" your point.
you could have selected Stafford Rangers who didn't move ground but are no where near their peak, same with York ( up until they moved last month), Kidderminster etc all are clubs who didn't move but are no where near their peak.
"Proof" that clubs who don't move suffer, especially when compared to Leicester City and Manchester City who moved grounds and have never been as successful.
Moving ground does not necessarily cause a team to slump, nor does it necessarily cause a team to succeed
New sites for football grounds in the south-east aren't easy to come by. I have no idea about Stafford Rangers or Kidderminster but neither Leicester or Manchester CIty moved out of their immediate areas as far as I can tell?
Even Bracknell Town's administration have said they regard the move to Sandhurst as a "stepping stone" and wish to return to Bracknell in the long term. There are questions as to whether Sandhurst could host Step 1 or 2 football for example.
Ultimately wherever possible I think clubs should play in the towns or places they represent. I know both clubs have ruled it out but a merger to become "Bracknell Forest FC" does feel sensible considering how closely aligned the two clubs are now.