I enjoyed the story a lot. As an isekai fan and a baseball fan, it was a great read. The characters were fun and amazing and the art style was phenomenal. I can't decide which girl I truly liked the best! My biggest gripe is the end. Not just because I want to see the MC get his harem ending, but because I felt there was also more to the story they could have done. So many more teams they could play against, alliances and envoys (especially from the last team) they could do. I'd love to see their team grow more to show a wide diversity of races; establish a bench of players that we, the readers, could see and have grown attached to, instead of a random name and new characters splashed in from no where.
But the real big thing I would have loved to see is: (ending spoilers) Taichi stay and do all that I mentioned above. New teams, new opponents and challenges. See Freedom be on the attack and be the Away team for once. But a line just before the Onigashima match set up the perfect opening for everyone to get the happy ending we wanted. The Gods admitted that it's not beyond their ability to rewind time. Taichi could have stayed, lived his life there, grown as a player or even a coach, and even raised a family (or two or three or, etc). Then near the end of it all, the Gods could come to him and take him back home to Earth, rewinding time so he was young again and healed. And now, with a lifetime of memories and experiences playing baseball with all sorts of other worldly races, become even better than he was before. We readers get the happy harem ending and Taichi gets to also go home to his family. Win-win.
A Grand-Slam ending.