Well in L3 we could redirect any user request to a custom controller using Route::any('(:any), (:any)/(:all)', 'mycontroller@index');
With the changes in L4 i kinda see this idea lost, so please (re)implement the feature in L4.
I don't know a beautiful alternative to that problem in L4, i guess i could listen for 404 pages, get the values of the URL myself and start over there, but that's an ugly solution, if anyone knows any better ways, please tell me.