Don't bother with queen bee unless you want to be a summoner, or really want the bee mount. Even so, there's no boss pre-hardmode that requires some form of flight to battle it, and her bees are painful and very small to see.
I gotta agree with the bees. I fought the Queen Bee with Frost Armor (or whatever it's called), around 55 defense, and the Queen's dash at me did 10 damage. I thought it would be easy but then she sent out bees that did 50 damage every attack.
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As for opinions on pre-hardmode expert items.
Shield of Cthulhu - Good for the defense, and dash is useful against even some hardmode bosses.
Worm Scarf - Amazing even for very late game, way better bonus than an entire warding set, imo.
Brain of Confusion - Okay for pre-hardmode, otherwise not worth it.
Slime King drop - Not useful, but fun.
Hive Pack - Useful for some types of weaponry, but otherwise useless.
Skeletron Hand thingy - Absolutely useless.
Demon Heart - Best of course.
@People talking about dungeon items - The dungeon is worth it imo.
Cobalt Shield - Makes the game a lot easier with no knockback and I think everyone can agree about this. Also can be upgraded for no debuffs, which is way better in expert.
Handgun - Makes the amazing Pheonix Blaster which is useful against WoF.
Muramasa - Required to make the Terra Blade.
Shadow Key - Gives lots of choices of good items.
Magic Weapons - completely useless