'Please can someone advise as stuck between two voices! ... my booking agent wants to cancel my whole flight LBA-DUB-SFO-LAS as connection in SFO now reduced to 1hr 45m. Alaska airlines still say time sufficient.

I assume that even though first flight is LBA-DUB, I can still use US immigration preclearance in Dublin which should obviously reduce time required in SFO? 1hr 45m then seems enough time to pick up checked bags at first point of entry into US and redrop for final journey to LAS?

Am I missing anything, wouldn't want to leave myself something unachievable. Any wise words appreciated. Many thanks