Phew... I'm playing for like 3 hours after the update. After some modification to my skybridge, I took on Moon Lord once again and won (although the heart dispenser didn't work as I wanted it, maybe due to the fact there are already 10 hearts in the world, possibly due the dead monster at the Pillars.). I admit, the fact magic mirror is out of equation now makes the fight much more harder. He's still doable, but I wish the dev may consider making the fight easier instead of taking out all the unorthodox strategy that allows first timer against him to win easily.
I have full vortex armor set, and had an Unreal VB and Unreal Sniper Rifle plus an elf melter (believe it or not, ironically, it saved my life a few times at solar pillar. The spinning enemy cannot reflect flames. Talk about fighting fire with fire.). As for accessory, I have the Vortex booster, sniper scope, Obsidian shield (too lazy to craft an Ankh one), Cross necklace and a Philosopher Stone, all refined to Menacing for +4% damage. (If you're first timer, Shroomite set plus the hoverboard might work too)
Basically my strategy is still the same, boost as far away from the boss as possible and fire away. However, if its head is charging its laser, I will hide underneath some of the dirt blocks I've placed above my skybridge until the danger pasts. Or I might just get hit by any other projectile and then phase through the laser harmlessly (thanks, cross necklace!). I didn't move my nurse despite the update and have healed once during the battle.
I've observed that Vortex Beater seemed to be shooting out its homing special shots more often now. Is it part of the VB buff?