OS X annoyances – Switching between application windows

Key command for switching between windows in OS X is ⌘`, which is quite difficult to enter with Swedish/Finnish keyboard layout because you have to hit three keys together and ` simply is not the most used key. Of course this command does not work for all programs. For example the Terminal.app uses ⌘← and ⌘→ to move from one window to another.

Could it be too difficult to assign a single key command to switch between windows inside a single program which would work in every application as expected?