With that PID, you still have the option of manually pulling a shot using the hot water switch on the Silvia - so you can continue to pull it how you do now. I still do this depending on the beans I use.
If you don't want the preinfusion option, you can opt for one of the PIDs without it and save a bit of money. The preinfusion function and the shot timer are independent variables. You can just use the PID to keep temperature.