I loved this game so much. I just finished getting all of the endings (or at least all of the CGs and I'm pretty sure all of the endings?). It was so much more serious than I thought it would be. My favorite part overall, I think, was the dynamic of the group of heroes. In a lot of adventure games, you play as the leader and you help everyone with their problems. It's interesting to see the idea of what happens when the leader dies and the group falls apart. I want to pick a favorite character/route but I can't even because I liked them all so much (I do really love the bad endings for Gunn and Kent. But also every other ending...).
The relationship April had with Erwin was really interesting, too. I liked when it came up in other routes. The mystery of April throughout the whole game was just really great. I also thought it was interesting that you have the same options when you ask who April was to a party member, and party members' varying responses.
I'm really happy to know that you're planning on expanding the game. I'm especially excited for the flashback scene with Gabby and Blake, because throughout both of their routes I wanted to know what exactly happened. As for voice acting, I too have noticed people have extremely mixed opinions about it. I think that voice acting, when it's good, can make a game seem more official, or finished, I guess. But it really comes down to the game itself, and I think this game is good either way. Though there were some lines that I would really like to hear voiced.
Especially some of Erwin's. I would really love to hear some of his crazier lines.
Also, I'm impressed that I can't make the main character's name April.