Tomino (the creator of G-Reco) has explicitly said that he made G-Reco to appeal to a difference audience. G-Reco is NOT meant for older Gundam fans (by Tomino's own words). Specifically, he wanted to appeal to children of the new generation that is currently growing up. And this anime is a mecha show with more of a "whimsical nature". The very opposite of Gundam.
Upon airing the TV show versio, the 26 episode anime had has issues with pacing, cramming too many factions into the show, and complaints about the cast being too large which meant not enough character development to go around.
After hearing these complaints, Tomino admitted in interviews that his approach to a 26 episode anime was flawed. That he normally works with anime that has a larger episode count closer (like Gundam where each series had around 52 episodes) These episodes allowed him more time to tell his story. He has heard the feedback, and he will improve himself and adjust his style to fit the 26 episode format.
He hopes that with the upcoming G-Reco Films, he can fix the issues people had with the anime. Specifically fixing issues with haphazard pacing, improved character development, and overall make the story much more clear to viewers. Plus he wants to improve the animation from the TV show.
Upon release of the first G-Reco films, it appears Tomino has generally succeeded. The G-Reco films have received overall positive praise, and Tomino has fixed most of the problems from the TV show had ....with the added bonus of much more improved animation in many scenes.
However not all G-Reco films are out yet, and it may take several more years for Tomino to complete their release.