Thieves is a fairly standard large town centre pub with big TVs showing sport. Not my thing so I avoid it at night but seems to have a fairly decent daytime trade at weekends when I walk past.
The gelato from gLite is very good. They make it in house and they are always trying out different flavours.
As for Perch, I've not tried the end of the pier one but I feel the Lancing one has gone down hill since they started expanding their venues.
The compass bus 8 or 8A pass by the entrance to the car park at the Bluebird. Not the most direct bus from the town centre as it meanders through residential areas of Goring and Ferring to pick up the pensioners who can't walk far enough to get the 700. If don't have a bus pass then you might...
Some more for your list
Orchard (near Waitrose) - good breakfast /Brunch
Salsa Viva Cantina - good mexican
Efes - great value and quality Turkish
Piggery - roast pork baps