I think I should mostly focus on the combat here.
I miss the old PSO2's flashy and fast paced combat, not gonna lie. The combat in NGS feels like a chore, charging some of the attacks (I mainly play sword since it is the closest to braver) takes forever, and deal very little damage.
The enemies feels like complete bullet sponges and upredictable attack moves, I just dont like this direction they are taking regarding the enemies and the way to combat them. In PSO2 when I started, even with low level gear the combat felt fast paced and the enemies did not feel like bullet sponges. Also you could easily read the enemy attack moves to initiate a perfect parry move or a dodge, without an entirely random attack coming outta nowhere sending you flying, especialy with how the NPC enemy bosses are designed that way. Sending your character flying constantly because there is lack of ways to read their attacks is infuriating at best.
Now, aside from the clunky combat that NGS has, I gotta point out the general lack of areas to explore, lack of random encounters and how generaly exploring the sectors feels like a chore.
In base PSO2 when you are on an expedition, you would get those "Emergency, code: Random mission" as an random encounter, in NGS you are mostly forced to follow random locations the game tells you to go to complete the objective, this kinda ruins the whole purpose of an open world game when you are forced to go to certain locations either way, and chase after PSE bursts.
My final hope for this game is that SEGA is atleast going to bring all of the old base PSO2 elements into NGS, what made PSO2 so lovable and addictive to me before NGS was launched.