-A new weapon type resembling a conductor's baton which is used to control summoned creatures.
(to emphasize: you have this one creature that looks like a pokemon (let's call it pseudo-mon from now on) and you get to
control it via conductor's baton in what appears to be a weaponized mix of pokemon amie & the wind waker)
-Skill Chain Combinations
(you can now do some sick follow-up combos regarding both of your chosen classes, Example: doing a Braver photon-art then following up
with a gunner skill or photon-art and ending with a Force technique, assuming you have the proper build for it)
-The (now fully working) inclusion of the new Race [Duman] & [Bouncer & Techer] classes.
(these were available since EP:3 but were limited in terms of skills & weapons that were not considered good enough to make a decent
build, as of EP:4 they're as viable as any other classes in-game, as for the Duman class, it's basically a glass cannon, you get to do insane
damage at the cost of being taken down in 1-3 hits, you MUST rely on perfect blocks in order to survive sometimes.)
-New photon-arts & weapons.
(the reason Bouncer & Techer are now viable)
-Character creation updated.
(SEGA added some extra customization options and now it's greater than ever, any per-existing costumes you've had are now segmented instead of being one-piece so you can now mix and match, also as a plus it gave veteran players a free makeup salon ticket (an item you only get by paying cash in real life) to celebrate the changes.)
-Added quick-character slots.
(Previously when someone wanted to change their classes into another class they previously had, you needed to re-equip and re-customize everything from scratch again which IMO takes at least 30+ mins depending on how complex your build is, with quick character slots, you can now save an existing build and
swap it without the hassle of re-doing all that customizing)
-Added more user-friendly beginner tutorials
(The game's learning curve might seem steep for newcomers but now there's proper training missions one can take that also yield acceptable items & meseta)
-Added new areas to explore
(from the trailer you can see it's a futuristic version of Japan's capital Tokyo, with the twist of having all sorts of new enemies mimicking modern-day machinery,
and for some weird reason... a T-Rex? oh well...
the capital itself features a Day/Night cycle, and since it's HUGE compared to the other maps, it also
has ways for fast-travel (inb4 gotta go fast jokes))
-Added the XH (Xtra Hard) difficulty to new areas
(thought PSO2 was easy? XH mode alters the behavior of ALL enemies into a more violent pattern, gives them stat boosts, and overall makes missions a lot
harder, on the bright side, XH drops pretty sweet loot as well.)
-Added a new bonus for daily runs.
(Previously, doing daily missions only gave you a pitiful amount of EXP/Meseta and wasn't that big of an incentive for people to do these, from now on,
whenever you complete your 3rd daily mission (3rd mission each day) there is a chance that it will drop you a bonus ticket (it's more of a key) that let's
you play a bonus mission, what's special about it you ask? this mission single-handedly yields an insane amount of EXP/Meseta and guarantees rare drops
at the end, if you pair it with a tri-boost, you easily level up 2-3 times if your character is underleveled.)