The solution is simple: stop having international breaks constantly and instead set aside a month either in season or at the end of the season for all international qualifiers to be played. That way the international teams get time to get into a groove by playing together, instead of this week together then a month off then a week together. This also stops club football from being so massively disrupted constantly, and allows for better spreading of cup and European commitments because it frees up a bit more time overall (when you consider that international week effectively wipes two weeks off the calendar but only results in two games played.) I’d be on board with the domestic season finishing in April then there is a month to play international matches in May, with players then getting June off and back for pre-season in July. In world cup and Euros years the schedule can maybe shift a few weeks given there will be no need for qualifier month in May.