I don't play online, and the story mode / adventure mode sucks. Even the fights suck for the most part. The only redeeming feature is that you can change leader in a team fight.
Things that stuck:
1. Short playtime
2. Uninspiring story (adventure mode), despite having both sakura and hinata.
3. Jutsu arsenals too limited, and uninspiring (what the heck, iruka's secret technique is nonsense)
4. Character nerfing (eg: Hinata/Hanabi/Neji's attacks shave off chakra in single player as com, but don't in vs mode)
5. Unrealistic character representation (kid konohanaru does more damage in secret jutsu than most jounin)
6. No world exploration (you jump around in a map instead)
7. Tools are massively nerfed (they used to be very useful tactically in the old games)
8. Long range users > everyone else (honestly, you can beat anybody easily with temari or tenten.
9. No modding (it would have let us fix so many problems)
10. Overall underwhelming.
What I liked:
1. More power to support characters
2. 1
Yep, that about sums it up. Even ultimate ninja 4 for ps2 felt more inspired.