The Striker actually does have pretty impressive range against Liberators and Galaxies if you remember to compensate for drop, because the seek range on it seems to be measured from their hull rather than the center of the model. For ESFs it's not so good at getting high flyers, mostly restricted instead to surprising people flying low and slow. However, there is one interesting trick you can do against ESFs: interrupting hover-duels from surprisingly long distance. Look for a friendly ESF that's getting into a hover-duel. Aim at the friendly, making sure to compensate for drop (don't worry, you won't hit him). Most of the rockets will manage to lock on to the enemy, netting you a kill if the friendly ESF got some hits in before your rockets arrived. I've interrupted duels from well outside the Grounder's lock-on range using that trick. Overall though, as much as people complained about it I did have a higher success rate with the previous version, where you had to maintain the lock until the rockets hit.