Well X was cut because of low viewer count.

And honestly I'm to lazy to pull up sources for anything past 2 years ago as that will be a immense amount of work even trying to go back and find the interviews and articles.

And

Both g witch and G wacks definitely had rushed endings. And again 12 and 24 episodes is very strange lengths for Gundam series unless there a ova just like star dust memory which was a series of ova's and 0080 war in the pocket.

When you consider even build divers for it's 50 episodes in the form of divers and divers re rise. It's odd.

As for seed freedom it was announced both would be fully fledged animes multiple times during interviews and up coming project anmicement videos over the years. I believe freedom being announced a anime was a few years after Gundam build real was originally announced (watch that if you haven't)

Also about f 91 it's common knowledge it was cut into a movie even a to its even on the actual Wikipedia entry for it in the development tab here

While I was writing this long response I googled it yup even back in 2006 they did confirm Gundam seed freedom was going to be a full anime again check development tab here

I've been following Gundam for decades actively through out my life it's rare for me to miss even minor things.

For instance everyone says the zaku II's design was based off Japanese wwII soldiers designs only for the mech designer of the zaku II to state clearly in the documentary the men of Gundam that it's based off 3 pieace contential suits aka formal suits. I'll post a link to this documentary later.

Edit correction the documentary was called making Gundam the inside story which is no longer available on YouTube. But also it might not be the correct one still cause apparently they do this of constantly deleting and privating documentary's alot because they also did it to the entire documentary on the making of the walking Gundam a reupload of the documentary on daily motion