Hi,
basically, under the hood, we have this rule: sendRateOnSerialize needs to be <= sendRate
I think it works this way:
sendrate is used by all built in features ( like synching general data, ) and sendRateOnSerialize will affect all the component based photonviews that synch your game's own set of data, so this affect Fsm Variables being synched.
The lower the sendrate, the less bandwith it will take, and the more efficient it will be, however you will increase the lag between players. Higher sendrate will improve and reduce lag at the cost of more information having to travel across internet. So this is a balance to seek basically. I would not touch this if you don't know exactly what you are doing and you have hard data to give evidence that modifying the send rate may increase your game quality or address a specific issue.
I would ask on Photon forum directly to get an educated answer, because the PlayMaker actions are directly accessing these.
Bye,
Jean
