I used to care a lot about tabs and pane splitting in the terminal emulator. Then I discovered terminal multiplexers: screen, then tmux. Now I don't want those features in the terminal emulator anymore, as they overlap and even conflict with the terminal multiplexer.
If you use a mac, I encourage you to try iTerm2/tmux-git. The combination allows you to reconnect to a remote tmux session and get a window with all of your tabs for that server. You'll never need to know the tmux commands again. You'll just use your native commands to switch tabs, search the history, see the list of open tabs, open new tabs, etc. This is the killer setup.