Absolutely a game of all time. Weird hodgepodge of different ideas, with hub world city connecting all the levels that you can fly around in, combat that is incredibly stiff, sidequests that feel ripped straight out of the PSO DLC archives, and an overall pacing that ends before it can even really get going. It definitely felt a bit nothing-burger at times, especially with the last few levels that reuse the same corridors and enemy patterns so many times you'd think you were playing P.T.
That is to say though it's really not the worst thing I've ever played. I went in with really low expectations due to hearing how apparently horrendous it was going to be and it really was just your typical licensed anime-tie in video game made by Sonic Team's B-team (I looked up some of the credits on segaretro, the game was mostly made by people that worked on the space channel 5 games than any actual seasoned member of Sonic Team, though one game designer went on to design the levels for Shadow the Hedgehog and it really shows). If I was a kid playing this game I would have had a solid amount of fun just flying around and talking to people so it's got that going for it I guess.
That is to say though it's really not the worst thing I've ever played. I went in with really low expectations due to hearing how apparently horrendous it was going to be and it really was just your typical licensed anime-tie in video game made by Sonic Team's B-team (I looked up some of the credits on segaretro, the game was mostly made by people that worked on the space channel 5 games than any actual seasoned member of Sonic Team, though one game designer went on to design the levels for Shadow the Hedgehog and it really shows). If I was a kid playing this game I would have had a solid amount of fun just flying around and talking to people so it's got that going for it I guess.