I haven't played the game or even watched the anime yet. I give this series a try.
It's all right. Feel free to cuss as long as it not towards your fellow users. I think you're right. It was at Tenrou Island. I do agree Natsu is pretty oblivious like Luffy. It's not like Rave Master where it was so obvious that Haru Glory and Elie will be together. I also agree that it was meaningless to bring back someone from the dead without giving her spotlight. Natsu is forgetful. I know it's not canon, but in the Dragon filler arc, he forgot about his promise to folks.
Fairy Tail suffers from having a large roster of characters. Only a few characters get some action.
correct me if im wrong, After lisanna came back did Natsu broke into lucy's house anymore? (seriously i forgot, I think Erza and wendy is the one who broke into lucy's home after the GMG)
The last time was in an OVA, Fairy Camp (OVA). They haven't done it after the time skip event. I know for sure Erza and Gray also broke into Lucy's home with Natsu. Not so sure about Wendy.