Andre,
PBR is there just to guarantee that the response from the server goes back to the SSLM.
If you do not use PBR, you need to find another solution to make the traffic go to the SSLM.
You can do this with static routes, but than all your traffic from the server will go through the SSLM. Even traffic that is not required to be seen by the SSLM.
Do you have a CSM maybe ?
Gilles.