Oracle Java Issue

Why isn't sound working with MP4 files? I think I can fix it, but that is poor, I could never recomend this distro to a newbie. Ditto Oracle Java not installed, licence or no licence issues - it's a problem.
Also I don't like the dolphin file manager - when I right click on a parent directory in the path at the top: I cannot "open in a new window" or "open in a new tab". There is no "open terminal at this location". This is basic usability stuff, why do the UI designers have to dumb everything down and make it a pain to work with, it's not the wretched Windows 8! It's a huge problem.
Why can't I customise the task bar in this way: I need a button for each INSTANCE of an open applicaiton yet KDE is grouping them by application type. Guys that's not the way we work, we are document-centric, not application centric! Can this be fixed, it's really annoying! Am I overlooking something?
It's usability things like this that are creating a terrible impression of KDE for me, and I really want to like it, but Mate is better, I'm afraid.
Thank you
James
Also I don't like the dolphin file manager - when I right click on a parent directory in the path at the top: I cannot "open in a new window" or "open in a new tab". There is no "open terminal at this location". This is basic usability stuff, why do the UI designers have to dumb everything down and make it a pain to work with, it's not the wretched Windows 8! It's a huge problem.
Why can't I customise the task bar in this way: I need a button for each INSTANCE of an open applicaiton yet KDE is grouping them by application type. Guys that's not the way we work, we are document-centric, not application centric! Can this be fixed, it's really annoying! Am I overlooking something?
It's usability things like this that are creating a terrible impression of KDE for me, and I really want to like it, but Mate is better, I'm afraid.
Thank you
James