just as you sais,if all the swedes abroad would play in "allsvenskan" it would be very entertaining,some teams are ok but when you see teams like häcken,elfsborg,sundsvall and gais it isnt fun anymore,sweden have 3-4 good teams the rest are craps.
i hope some team can make it in europe,but it will be difficult

ifk göteborg dominated the swedish football scene for many years and beat huge clubs like man utd milan and barca but it wont happen again,these teams have become too $$$$$rich
and now when they can sign how many foreigners they want they are in advantage....
ifk had mostly of the great swedes playing in sweden in their team some years ago(ravelli,erlingmark,blomqvist,lucic,kåmark,björklund.a.anderssson etc)now they are old and gone or playing abroad,teams like aik and halmstad have also great players now,and if they are selling some players they are not selling them to ifk.....
thats one of the reasons why swedish football isn that good anymore.
one other reason is that the teams are poor,and the arenas are small,look at kalmars arena,it was a joke......
sorry but swedish footbalöl has a long way to go yet....