IMO you don't want a Pep Guardiola in a national team. There's no time to implement complicated systems, as you most of the times have players from 5-6 different teams. There are expectations to this, like Germany in 2014 and Spain 2010 (and their EURO wins). Germany was majority Bayern players and Spain majority Barca players. That's why they could dominate so hard.
Then we see France 2018, Portugal 2016, Italy 2006, Greece 2004. People would say it's "boring football" or lucky, but it's a trend in national tournaments. I think u will regret this one day. Every swede wanted Lars Lagerbäck sacked because he played boring 4-4-2 and never went further than RO16. We changed to Hamren who tried play fancy 4-3-3 but failed miserably. Went back to a classic 4-4-2 manager, Janne Andersson, and we're back advancing from groupstages, even reaching quarter finals.
Simplicity is better in national teams most of the times