This is essentially two smaller games together. One great and one bad.
The building is fantastic. I have sat for hours just building my Gundam. It’s a marvel to build. The complaints are few and far between, many of which have been addressed by updates.
Conversely the actual gameplay is… bland. Especially compared to the previous title. Never have I gone to a sequel and felt both significantly weaker and less challenged. Levels are empty, enemies are non threatening, and your abilities are far more limited than in 3. Gone are the vehicles and crates in the levels. Gone are levels with multiple areas to engage. Now it’s just 3 circular arenas. You never have to go anywhere.
But it on sale and play the game only to get more parts. Otherwise go play armored core 6 for good gameplay.