Hello!
Currently default DBeaver keybindings scheme is very similar to Visual Studio/IntelliJ IDEA key schemes. And, for sure, while it is intuitive for some people it is inconvinient for others.
"Delete line" action binded to Ctrl-Y shortcut (which means "Redo" in default Eclipse scheme). It could be confusing

Of course you may change any bindings in Preferences.
Mostly it is religious question - which key scheme should be default so I don't think it is possible to make right decision. Anyway, we are going to add standard Eclipse key scheme in DBeaver in future version.
Concerning parenthesis highlighting. It is a great feature but generally it is not available for RCPs in Eclipse framework. We are planning to improve SQL editor in some future version (add highlightings and some other "intellectual" features) but not in nearest one.
Thanks!