Now that the dust has settled, I think the worst things that happened were:
Littering: your fellow brits really litter a lot, and that's coming from someone who lives in Portugal, where the population is a bit carelless with trash.
They look a bit of different players: in Arsenal he had a more mobile role, being a bit all over the place, and played as winger or support striker, depending the game. In here he was leading our front line and he excelled at it.
We had some football pros coming to our Judo and BJJ club make a training: they were dead by exaustion at the end of the warm up, and during combat training they defaulted after 2 minutes.
So, no, not really that impressive.
I actually like the unlimited subs: teams would be playing always 100% effort, because they could rotate their players. No clock stop for needed for substitutions, though, and there would be a substituiton area where players would had to leave...