I see this is an older post with no replies but would like to know the outcome. From my understanding there should not be any impact to event propagation when going to 11.3.02. Did you migrate the kb during the upgrade?
TSIM events generated from rate are propagated to TSPS via a propagation rule in the ppm_propagate.mrl file and the gateway mcell.dir entry - if the entry is missing then events do not get propagated.
As you are propagating alerts from the remote cell, I guess you will need an additional propagation rule for TSPS gateway.