If it were up to me, I’d just add in Emerald’s Solar Blast and probably leave it at that. The Egg Launcher was a cool idea thematically and mechanically, but it’d be absolute hell to balance due to the risk factor.
Perhaps something close-range like Davoid’s Particle Stabber could be a good addition if done right.
One important thing to note is that we already have 14 weapons in the game, not counting Moron. That’s 14 gifts you have to juggle during gameplay, and more is just going to make it less likely for you to find what you’re looking for. Add a few more weapons, and we’re probably going to need a weapon licence system, like what was originally planned.