In my experience, the way Ubuntu handles UEFI and GPT partitions has slowly and steadily improved over the last few years and I feel that this will continue. The Ubuntu installer itself has come on in leaps and bounds throughout the development cycle.
However, I think this is the wrong place to be asking for peoples' opinions about this stuff and the Ubuntu Forums might be a better venue. This site is better for answering specific technical questions. As I am writing this, I am looking at the guidelines, above my reply, which state:
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It is therefore very difficult to answer your question in any meaningful way.
Your lack of a specific question makes this very difficult, but I must say that you give up too easily!
That being said, I did my research and managed to make it work.
I actually wrote up a howto and posted it to this very site:
How do I create a multiboot environment using LVM for your *buntu operating systems on a GPT formatted system drive, in a UEFI based system?
Parts of it should be very useful in enabling you to do what you want.
Just remember that the big commercial Operating Systems, such as Windows, do not play nicely at all with other OSes and that Linux, flawed as it may be, is likely to provide you with the best options in dealing with this issue.
Stick with it!